2101782609408 has 40 divisors (see below), whose sum is σ = 5599280236968. Its totient is φ = 700594202624.

The previous prime is 2101782609379. The next prime is 2101782609461. The reversal of 2101782609408 is 8049062871012.

It is a happy number.

It is a super-2 number, since 2×2101782609408² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 684172491 + ... + 684175562.

Almost surely, 2^{2101782609408} is an apocalyptic number.

It is an amenable number.

2101782609408 is an abundant number, since it is smaller than the sum of its proper divisors (3497497627560).

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

2101782609408 is an equidigital number, since it uses as much as digits as its factorization.

2101782609408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368348074 (or 1368348058 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 2101782609408 in words is "two trillion, one hundred one billion, seven hundred eighty-two million, six hundred nine thousand, four hundred eight".