1556344337972 has 6 divisors (see below), whose sum is σ = 2723602591458. Its totient is φ = 778172168984.

The previous prime is 1556344337941. The next prime is 1556344337983. The reversal of 1556344337972 is 2797334436551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1473927114916 + 82417223056 = 1214054^2 + 287084^2 .

It is a super-2 number, since 2×1556344337972² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194543042243 + ... + 194543042250.

It is an arithmetic number, because the mean of its divisors is an integer number (453933765243).

Almost surely, 2^{1556344337972} is an apocalyptic number.

It is an amenable number.

1556344337972 is a deficient number, since it is larger than the sum of its proper divisors (1167258253486).

1556344337972 is a wasteful number, since it uses less digits than its factorization.

1556344337972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389086084497 (or 389086084495 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 59.

The spelling of 1556344337972 in words is "one trillion, five hundred fifty-six billion, three hundred forty-four million, three hundred thirty-seven thousand, nine hundred seventy-two".