61005005005556 has 24 divisors (see below), whose sum is σ = 110385955196160. Its totient is φ = 29469435048000.

The previous prime is 61005005005537. The next prime is 61005005005577. The reversal of 61005005005556 is 65550050050016.

It is a super-2 number, since 2×61005005005556² (a number of 28 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, 409223186 + ... + 409372233.

It is an arithmetic number, because the mean of its divisors is an integer number (4599414799840).

Almost surely, 2^{61005005005556} is an apocalyptic number.

It is an amenable number.

61005005005556 is a deficient number, since it is larger than the sum of its proper divisors (49380950190604).

61005005005556 is a wasteful number, since it uses less digits than its factorization.

61005005005556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818596055 (or 818596053 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 61005005005556 in words is "sixty-one trillion, five billion, five million, five thousand, five hundred fifty-six".