61131852500 has 60 divisors (see below), whose sum is σ = 134645649600. Its totient is φ = 24276684000.

The previous prime is 61131852413. The next prime is 61131852517. The reversal of 61131852500 is 525813116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 259541 + ... + 435459.

It is an arithmetic number, because the mean of its divisors is an integer number (2244094160).

Almost surely, 2^61131852500 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 61131852500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67322824800).

61131852500 is an abundant number, since it is smaller than the sum of its proper divisors (73513797100).

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

61131852500 is a wasteful number, since it uses less digits than its factorization.

61131852500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176082 (or 176065 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 61131852500 in words is "sixty-one billion, one hundred thirty-one million, eight hundred fifty-two thousand, five hundred".