61137293865 has 8 divisors (see below), whose sum is σ = 97819670208. Its totient is φ = 32606556720.

The previous prime is 61137293857. The next prime is 61137293879. The reversal of 61137293865 is 56839273116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61137293865 - 2³ = 61137293857 is a prime.

It is a super-2 number, since 2×61137293865² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2037909781 + ... + 2037909810.

It is an arithmetic number, because the mean of its divisors is an integer number (12227458776).

Almost surely, 2^61137293865 is an apocalyptic number.

It is an amenable number.

61137293865 is a deficient number, since it is larger than the sum of its proper divisors (36682376343).

61137293865 is a wasteful number, since it uses less digits than its factorization.

61137293865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075819599.

The product of its digits is 1632960, while the sum is 51.

The spelling of 61137293865 in words is "sixty-one billion, one hundred thirty-seven million, two hundred ninety-three thousand, eight hundred sixty-five".