61736721010 has 8 divisors (see below), whose sum is σ = 111126097836. Its totient is φ = 24694688400.

The previous prime is 61736721001. The next prime is 61736721031. The reversal of 61736721010 is 1012763716.

It can be written as a sum of positive squares in 2 ways, for example, as 53745612561 + 7991108449 = 231831^2 + 89393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×61736721010² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3086836041 + ... + 3086836060.

Almost surely, 2^61736721010 is an apocalyptic number.

61736721010 is a deficient number, since it is larger than the sum of its proper divisors (49389376826).

61736721010 is a wasteful number, since it uses less digits than its factorization.

61736721010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6173672108.

The product of its (nonzero) digits is 10584, while the sum is 34.

The spelling of 61736721010 in words is "sixty-one billion, seven hundred thirty-six million, seven hundred twenty-one thousand, ten".