61249431325 has 12 divisors (see below), whose sum is σ = 80416900980. Its totient is φ = 46117218560.

The previous prime is 61249431307. The next prime is 61249431407. The reversal of 61249431325 is 52313494216.

61249431325 = 34630² + 34631² + ... + 34680².

It can be written as a sum of positive squares in 6 ways, for example, as 1431033241 + 59818398084 = 37829^2 + 244578^2 .

It is not a de Polignac number, because 61249431325 - 2⁵ = 61249431293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72057730 + ... + 72058579.

It is an arithmetic number, because the mean of its divisors is an integer number (6701408415).

Almost surely, 2^61249431325 is an apocalyptic number.

It is an amenable number.

61249431325 is a deficient number, since it is larger than the sum of its proper divisors (19167469655).

61249431325 is a wasteful number, since it uses less digits than its factorization.

61249431325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144116336 (or 144116331 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The spelling of 61249431325 in words is "sixty-one billion, two hundred forty-nine million, four hundred thirty-one thousand, three hundred twenty-five".