61249431308 has 24 divisors (see below), whose sum is σ = 122221717632. Its totient is φ = 26606087424.

The previous prime is 61249431307. The next prime is 61249431407. The reversal of 61249431308 is 80313494216.

It is not an unprimeable number, because it can be changed into a prime (61249431307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34642460 + ... + 34644227.

It is an arithmetic number, because the mean of its divisors is an integer number (5092571568).

Almost surely, 2^61249431308 is an apocalyptic number.

61249431308 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

61249431308 is a deficient number, since it is larger than the sum of its proper divisors (60972286324).

61249431308 is a wasteful number, since it uses less digits than its factorization.

61249431308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69286721 (or 69286719 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 61249431308 in words is "sixty-one billion, two hundred forty-nine million, four hundred thirty-one thousand, three hundred eight".