61985262323761 has 4 divisors (see below), whose sum is σ = 70840299798592. Its totient is φ = 53130224848932.

The previous prime is 61985262323729. The next prime is 61985262323767. The reversal of 61985262323761 is 16732326258916.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61985262323761 - 2⁵ = 61985262323729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61985262323761.

It is not an unprimeable number, because it can be changed into a prime (61985262323767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4427518737405 + ... + 4427518737418.

It is an arithmetic number, because the mean of its divisors is an integer number (17710074949648).

Almost surely, 2^{61985262323761} is an apocalyptic number.

It is an amenable number.

61985262323761 is a deficient number, since it is larger than the sum of its proper divisors (8855037474831).

61985262323761 is an equidigital number, since it uses as much as digits as its factorization.

61985262323761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8855037474830.

The product of its digits is 39191040, while the sum is 61.

The spelling of 61985262323761 in words is "sixty-one trillion, nine hundred eighty-five billion, two hundred sixty-two million, three hundred twenty-three thousand, seven hundred sixty-one".