61087921724 has 6 divisors (see below), whose sum is σ = 106903863024. Its totient is φ = 30543960860.

The previous prime is 61087921717. The next prime is 61087921729. The reversal of 61087921724 is 42712978016.

It is a super-2 number, since 2×61087921724² (a number of 22 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 7635990212 + ... + 7635990219.

It is an arithmetic number, because the mean of its divisors is an integer number (17817310504).

Almost surely, 2^61087921724 is an apocalyptic number.

It is an amenable number.

61087921724 is a deficient number, since it is larger than the sum of its proper divisors (45815941300).

61087921724 is a wasteful number, since it uses less digits than its factorization.

61087921724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15271980435 (or 15271980433 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The spelling of 61087921724 in words is "sixty-one billion, eighty-seven million, nine hundred twenty-one thousand, seven hundred twenty-four".