1826891515940 has 24 divisors (see below), whose sum is σ = 4062147018552. Its totient is φ = 687770923520.

The previous prime is 1826891515903. The next prime is 1826891515951. The reversal of 1826891515940 is 495151986281.

It can be written as a sum of positive squares in 4 ways, for example, as 935955632704 + 890935883236 = 967448^2 + 943894^2 .

It is a super-2 number, since 2×1826891515940² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1826891515940.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2686604831 + ... + 2686605510.

It is an arithmetic number, because the mean of its divisors is an integer number (169256125773).

Almost surely, 2^{1826891515940} is an apocalyptic number.

1826891515940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1826891515940 is an abundant number, since it is smaller than the sum of its proper divisors (2235255502612).

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

1826891515940 is a wasteful number, since it uses less digits than its factorization.

1826891515940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373210367 (or 5373210365 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 59.

The spelling of 1826891515940 in words is "one trillion, eight hundred twenty-six billion, eight hundred ninety-one million, five hundred fifteen thousand, nine hundred forty".