61566103158 has 32 divisors (see below), whose sum is σ = 144525836544. Its totient is φ = 17114900832.

The previous prime is 61566103153. The next prime is 61566103187. The reversal of 61566103158 is 85130166516.

61566103158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61566103158² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61566103153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19807360 + ... + 19810467.

It is an arithmetic number, because the mean of its divisors is an integer number (4516432392).

Almost surely, 2^61566103158 is an apocalyptic number.

61566103158 is an abundant number, since it is smaller than the sum of its proper divisors (82959733386).

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

61566103158 is a wasteful number, since it uses less digits than its factorization.

61566103158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39617876.

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 61566103158 in words is "sixty-one billion, five hundred sixty-six million, one hundred three thousand, one hundred fifty-eight".