1556945355072 has 56 divisors (see below), whose sum is σ = 4252302383872. Its totient is φ = 502240435200.

The previous prime is 1556945355047. The next prime is 1556945355253. The reversal of 1556945355072 is 2705535496551.

It is a super-2 number, since 2×1556945355072² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130785829 + ... + 130797732.

Almost surely, 2^{1556945355072} is an apocalyptic number.

1556945355072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1556945355072 is an abundant number, since it is smaller than the sum of its proper divisors (2695357028800).

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

1556945355072 is a wasteful number, since it uses less digits than its factorization.

1556945355072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261583607 (or 261583597 counting only the distinct ones).

The product of its (nonzero) digits is 28350000, while the sum is 57.

The spelling of 1556945355072 in words is "one trillion, five hundred fifty-six billion, nine hundred forty-five million, three hundred fifty-five thousand, seventy-two".