61215334137 has 24 divisors (see below), whose sum is σ = 89519752608. Its totient is φ = 40306593600.

The previous prime is 61215334097. The next prime is 61215334151. The reversal of 61215334137 is 73143351216.

61215334137 is a `hidden beast` number, since 61 + 21 + 533 + 41 + 3 + 7 = 666.

It is not a de Polignac number, because 61215334137 - 2⁶ = 61215334073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61215334177) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125733 + ... + 371805.

It is an arithmetic number, because the mean of its divisors is an integer number (3729989692).

Almost surely, 2^61215334137 is an apocalyptic number.

It is an amenable number.

61215334137 is a deficient number, since it is larger than the sum of its proper divisors (28304418471).

61215334137 is a wasteful number, since it uses less digits than its factorization.

61215334137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246421 (or 246418 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The spelling of 61215334137 in words is "sixty-one billion, two hundred fifteen million, three hundred thirty-four thousand, one hundred thirty-seven".