61610155506 has 24 divisors (see below), whose sum is σ = 137096473644. Its totient is φ = 19981671840.

The previous prime is 61610155487. The next prime is 61610155511. The reversal of 61610155506 is 60555101616.

It can be written as a sum of positive squares in 2 ways, for example, as 54272691225 + 7337464281 = 232965^2 + 85659^2 .

It is a super-2 number, since 2×61610155506² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46253205 + ... + 46254536.

Almost surely, 2^61610155506 is an apocalyptic number.

61610155506 is an abundant number, since it is smaller than the sum of its proper divisors (75486318138).

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

61610155506 is a wasteful number, since it uses less digits than its factorization.

61610155506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92507786 (or 92507783 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 61610155506 in words is "sixty-one billion, six hundred ten million, one hundred fifty-five thousand, five hundred six".