61310536 has 16 divisors (see below), whose sum is σ = 131379840. Its totient is φ = 26275920.

The previous prime is 61310531. The next prime is 61310569. The reversal of 61310536 is 63501316.

It is a self number, because there is not a number n which added to its sum of digits gives 61310536.

It is not an unprimeable number, because it can be changed into a prime (61310531) 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, 547360 + ... + 547471.

It is an arithmetic number, because the mean of its divisors is an integer number (8211240).

Almost surely, 2^61310536 is an apocalyptic number.

It is an amenable number.

61310536 is an abundant number, since it is smaller than the sum of its proper divisors (70069304).

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

61310536 is a wasteful number, since it uses less digits than its factorization.

61310536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094844 (or 1094840 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 61310536 is about 7830.1044692903. The cubic root of 61310536 is about 394.3165792843.

The spelling of 61310536 in words is "sixty-one million, three hundred ten thousand, five hundred thirty-six".