61929761500 has 96 divisors (see below), whose sum is σ = 138939929856. Its totient is φ = 24103116800.

The previous prime is 61929761497. The next prime is 61929761539. The reversal of 61929761500 is 516792916.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4057884 + ... + 4073116.

It is an arithmetic number, because the mean of its divisors is an integer number (1447290936).

Almost surely, 2^61929761500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61929761500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69469964928).

61929761500 is an abundant number, since it is smaller than the sum of its proper divisors (77010168356).

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

61929761500 is a wasteful number, since it uses less digits than its factorization.

61929761500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15472 (or 15460 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 46.

The spelling of 61929761500 in words is "sixty-one billion, nine hundred twenty-nine million, seven hundred sixty-one thousand, five hundred".