1556615231228 has 48 divisors (see below), whose sum is σ = 2745615277440. Its totient is φ = 772183425024.

The previous prime is 1556615231201. The next prime is 1556615231233. The reversal of 1556615231228 is 8221325166551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400259108 + ... + 400262996.

It is an arithmetic number, because the mean of its divisors is an integer number (57200318280).

Almost surely, 2^{1556615231228} is an apocalyptic number.

It is an amenable number.

1556615231228 is a deficient number, since it is larger than the sum of its proper divisors (1189000046212).

1556615231228 is a wasteful number, since it uses less digits than its factorization.

1556615231228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606 (or 5604 counting only the distinct ones).

The product of its digits is 864000, while the sum is 47.

The spelling of 1556615231228 in words is "one trillion, five hundred fifty-six billion, six hundred fifteen million, two hundred thirty-one thousand, two hundred twenty-eight".