61929245910 has 128 divisors (see below), whose sum is σ = 179074105344. Its totient is φ = 13407108480.

The previous prime is 61929245891. The next prime is 61929245947. The reversal of 61929245910 is 1954292916.

It is a self number, because there is not a number n which added to its sum of digits gives 61929245910.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 204769 + ... + 407171.

It is an arithmetic number, because the mean of its divisors is an integer number (1399016448).

Almost surely, 2^61929245910 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61929245910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89537052672).

61929245910 is an abundant number, since it is smaller than the sum of its proper divisors (117144859434).

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

61929245910 is a wasteful number, since it uses less digits than its factorization.

61929245910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202498.

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 61929245910 in words is "sixty-one billion, nine hundred twenty-nine million, two hundred forty-five thousand, nine hundred ten".