61157755700 has 18 divisors (see below), whose sum is σ = 132712330086. Its totient is φ = 24463102240.

The previous prime is 61157755679. The next prime is 61157755721. The reversal of 61157755700 is 755775116.

61157755700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61157755679) and next prime (61157755721).

It can be written as a sum of positive squares in 3 ways, for example, as 4838871844 + 56318883856 = 69562^2 + 237316^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305788679 + ... + 305788878.

It is an arithmetic number, because the mean of its divisors is an integer number (7372907227).

Almost surely, 2^61157755700 is an apocalyptic number.

It is an amenable number.

61157755700 is an abundant number, since it is smaller than the sum of its proper divisors (71554574386).

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

61157755700 is a wasteful number, since it uses less digits than its factorization.

61157755700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611577571 (or 611577564 counting only the distinct ones).

The product of its (nonzero) digits is 257250, while the sum is 44.

The spelling of 61157755700 in words is "sixty-one billion, one hundred fifty-seven million, seven hundred fifty-five thousand, seven hundred".