61087921725 has 48 divisors (see below), whose sum is σ = 106619912000. Its totient is φ = 30776785920.

The previous prime is 61087921717. The next prime is 61087921729. The reversal of 61087921725 is 52712978016.

It is not a de Polignac number, because 61087921725 - 2³ = 61087921717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61087921729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 435909 + ... + 558741.

Almost surely, 2^61087921725 is an apocalyptic number.

It is an amenable number.

61087921725 is a deficient number, since it is larger than the sum of its proper divisors (45531990275).

61087921725 is a wasteful number, since it uses less digits than its factorization.

61087921725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123214 (or 123209 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 61087921725 in words is "sixty-one billion, eighty-seven million, nine hundred twenty-one thousand, seven hundred twenty-five".