61310872857 has 16 divisors (see below), whose sum is σ = 88545014208. Its totient is φ = 37511672640.

The previous prime is 61310872837. The next prime is 61310872859. The reversal of 61310872857 is 75827801316.

It is a happy number.

61310872857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61310872857 - 2¹⁰ = 61310871833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61310872859) 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, 4536819 + ... + 4550312.

It is an arithmetic number, because the mean of its divisors is an integer number (5534063388).

Almost surely, 2^61310872857 is an apocalyptic number.

It is an amenable number.

61310872857 is a deficient number, since it is larger than the sum of its proper divisors (27234141351).

61310872857 is a wasteful number, since it uses less digits than its factorization.

61310872857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9087320.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 61310872857 in words is "sixty-one billion, three hundred ten million, eight hundred seventy-two thousand, eight hundred fifty-seven".