61391955076 has 9 divisors (see below), whose sum is σ = 107436788599. Its totient is φ = 30695729764.

The previous prime is 61391955071. The next prime is 61391955091. The reversal of 61391955076 is 67055919316.

The square root of 61391955076 is 247774.

It is a perfect power (a square), and thus also a powerful number.

61391955076 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61391955071) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 433605 + ... + 557491.

Almost surely, 2^61391955076 is an apocalyptic number.

61391955076 is the 247774-th square number.

It is an amenable number.

61391955076 is a deficient number, since it is larger than the sum of its proper divisors (46044833523).

61391955076 is an frugal number, since it uses more digits than its factorization.

61391955076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247778 (or 123889 counting only the distinct ones).

The product of its (nonzero) digits is 1530900, while the sum is 52.

The spelling of 61391955076 in words is "sixty-one billion, three hundred ninety-one million, nine hundred fifty-five thousand, seventy-six".