61115345536 has 32 divisors (see below), whose sum is σ = 139146547680. Its totient is φ = 26192290560.

The previous prime is 61115345497. The next prime is 61115345537. The reversal of 61115345536 is 63554351116.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (61115345537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34103650 + ... + 34105441.

It is an arithmetic number, because the mean of its divisors is an integer number (4348329615).

Almost surely, 2^61115345536 is an apocalyptic number.

It is an amenable number.

61115345536 is an abundant number, since it is smaller than the sum of its proper divisors (78031202144).

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

61115345536 is an equidigital number, since it uses as much as digits as its factorization.

61115345536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68209112 (or 68209100 counting only the distinct ones).

The product of its digits is 162000, while the sum is 40.

The spelling of 61115345536 in words is "sixty-one billion, one hundred fifteen million, three hundred forty-five thousand, five hundred thirty-six".