61156706555 has 64 divisors (see below), whose sum is σ = 86106931200. Its totient is φ = 40836178944.

The previous prime is 61156706509. The next prime is 61156706561. The reversal of 61156706555 is 55560765116.

It is a cyclic number.

It is not a de Polignac number, because 61156706555 - 2¹² = 61156702459 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133821887 + ... + 133822343.

It is an arithmetic number, because the mean of its divisors is an integer number (1345420800).

Almost surely, 2^61156706555 is an apocalyptic number.

61156706555 is a deficient number, since it is larger than the sum of its proper divisors (24950224645).

61156706555 is a wasteful number, since it uses less digits than its factorization.

61156706555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 945000, while the sum is 47.

The spelling of 61156706555 in words is "sixty-one billion, one hundred fifty-six million, seven hundred six thousand, five hundred fifty-five".