61005000556 has 12 divisors (see below), whose sum is σ = 106784635720. Its totient is φ = 30495104640.

The previous prime is 61005000523. The next prime is 61005000583. The reversal of 61005000556 is 65500050016.

It is a super-2 number, since 2×61005000556² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1830330 + ... + 1863361.

Almost surely, 2^61005000556 is an apocalyptic number.

It is an amenable number.

61005000556 is a deficient number, since it is larger than the sum of its proper divisors (45779635164).

61005000556 is a wasteful number, since it uses less digits than its factorization.

61005000556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697824 (or 3697822 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 61005000556 in words is "sixty-one billion, five million, five hundred fifty-six", and thus it is an aban number.