1375821990432 has 90 divisors (see below), whose sum is σ = 4046429890503. Its totient is φ = 458587424448.

The previous prime is 1375821990377. The next prime is 1375821990443. The reversal of 1375821990432 is 2340991285731.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1375821990432 is a `hidden beast` number, since 1 + 3 + 7 + 582 + 19 + 9 + 0 + 43 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 687910995216 + 687910995216 = 829404^2 + 829404^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=829404.

It is a super-2 number, since 2×1375821990432² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 59705569 + ... + 59728607.

Almost surely, 2^{1375821990432} is an apocalyptic number.

1375821990432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1375821990432 is an abundant number, since it is smaller than the sum of its proper divisors (2670607900071).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1375821990432 is an frugal number, since it uses more digits than its factorization.

1375821990432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46100 (or 23044 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 1375821990432 in words is "one trillion, three hundred seventy-five billion, eight hundred twenty-one million, nine hundred ninety thousand, four hundred thirty-two".