61249431306 has 24 divisors (see below), whose sum is σ = 142498677600. Its totient is φ = 17499837432.

The previous prime is 61249431293. The next prime is 61249431307. The reversal of 61249431306 is 60313494216.

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 11 ways as a sum of consecutive naturals, for example, 104165406 + ... + 104165993.

It is an arithmetic number, because the mean of its divisors is an integer number (5937444900).

Almost surely, 2^61249431306 is an apocalyptic number.

61249431306 is an abundant number, since it is smaller than the sum of its proper divisors (81249246294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61249431306 is a wasteful number, since it uses less digits than its factorization.

61249431306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208331418 (or 208331411 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 61249431306 in words is "sixty-one billion, two hundred forty-nine million, four hundred thirty-one thousand, three hundred six".