1556197412 has 24 divisors (see below), whose sum is σ = 3395340480. Its totient is φ = 606310560.

The previous prime is 1556197399. The next prime is 1556197441. The reversal of 1556197412 is 2147916551.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1556197412.

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, 2525987 + ... + 2526602.

It is an arithmetic number, because the mean of its divisors is an integer number (141472520).

Almost surely, 2^1556197412 is an apocalyptic number.

It is an amenable number.

1556197412 is an abundant number, since it is smaller than the sum of its proper divisors (1839143068).

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

1556197412 is a wasteful number, since it uses less digits than its factorization.

1556197412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5052611 (or 5052609 counting only the distinct ones).

The product of its digits is 75600, while the sum is 41.

The square root of 1556197412 is about 39448.6680637002. The cubic root of 1556197412 is about 1158.8348913887.

The spelling of 1556197412 in words is "one billion, five hundred fifty-six million, one hundred ninety-seven thousand, four hundred twelve".