1556874474072 has 128 divisors (see below), whose sum is σ = 4201246828800. Its totient is φ = 479022829568.

The previous prime is 1556874474041. The next prime is 1556874474073. The reversal of 1556874474072 is 2704744786551.

It is a super-2 number, since 2×1556874474072² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1556874473997 and 1556874474015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556874474073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4471579 + ... + 4807157.

It is an arithmetic number, because the mean of its divisors is an integer number (32822240850).

Almost surely, 2^{1556874474072} is an apocalyptic number.

1556874474072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1556874474072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2100623414400).

1556874474072 is an abundant number, since it is smaller than the sum of its proper divisors (2644372354728).

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

1556874474072 is a wasteful number, since it uses less digits than its factorization.

1556874474072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335825 (or 335821 counting only the distinct ones).

The product of its (nonzero) digits is 52684800, while the sum is 60.

The spelling of 1556874474072 in words is "one trillion, five hundred fifty-six billion, eight hundred seventy-four million, four hundred seventy-four thousand, seventy-two".