61929308736 has 63 divisors (see below), whose sum is σ = 177526302681. Its totient is φ = 20641112064.

The previous prime is 61929308731. The next prime is 61929308741. The reversal of 61929308736 is 63780392916.

The square root of 61929308736 is 248856.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (61929308731) and next prime (61929308741).

It can be written as a sum of positive squares in only one way, i.e., 3404022336 + 58525286400 = 58344^2 + 241920^2 .

It is not an unprimeable number, because it can be changed into a prime (61929308731) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5967360 + ... + 5977728.

Almost surely, 2^61929308736 is an apocalyptic number.

61929308736 is the 248856-th square number.

It is an amenable number.

61929308736 is an abundant number, since it is smaller than the sum of its proper divisors (115596993945).

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

61929308736 is an frugal number, since it uses more digits than its factorization.

61929308736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20756 (or 10374 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 61929308736 in words is "sixty-one billion, nine hundred twenty-nine million, three hundred eight thousand, seven hundred thirty-six".