1556000061636 has 48 divisors (see below), whose sum is σ = 3646678089600. Its totient is φ = 516381450240.

The previous prime is 1556000061617. The next prime is 1556000061643. The reversal of 1556000061636 is 6361600006551.

It is a super-2 number, since 2×1556000061636² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1556000061594 and 1556000061603.

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, 5881281 + ... + 6140151.

It is an arithmetic number, because the mean of its divisors is an integer number (75972460200).

Almost surely, 2^{1556000061636} is an apocalyptic number.

It is an amenable number.

1556000061636 is an abundant number, since it is smaller than the sum of its proper divisors (2090678027964).

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

1556000061636 is a wasteful number, since it uses less digits than its factorization.

1556000061636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261084 (or 261082 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 1556000061636 in words is "one trillion, five hundred fifty-six billion, sixty-one thousand, six hundred thirty-six".