61937770129 has 9 divisors (see below), whose sum is σ = 62311571049. Its totient is φ = 61566202740.

The previous prime is 61937770109. The next prime is 61937770171. The reversal of 61937770129 is 92107773916.

The square root of 61937770129 is 248873.

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

It is not a de Polignac number, because 61937770129 - 2⁷ = 61937770001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61937770109) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47534092 + ... + 47535394.

Almost surely, 2^61937770129 is an apocalyptic number.

61937770129 is the 248873-rd square number.

61937770129 is the 124437-th centered octagonal number.

It is an amenable number.

61937770129 is a deficient number, since it is larger than the sum of its proper divisors (373800920).

61937770129 is an frugal number, since it uses more digits than its factorization.

61937770129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2988 (or 1494 counting only the distinct ones).

The product of its (nonzero) digits is 1000188, while the sum is 52.

The spelling of 61937770129 in words is "sixty-one billion, nine hundred thirty-seven million, seven hundred seventy thousand, one hundred twenty-nine".