61851677793 has 4 divisors (see below), whose sum is σ = 82468903728. Its totient is φ = 41234451860.

The previous prime is 61851677753. The next prime is 61851677807. The reversal of 61851677793 is 39777615816.

61851677793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 61851677793 - 2²⁴ = 61834900577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61851677753) 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, 10308612963 + ... + 10308612968.

It is an arithmetic number, because the mean of its divisors is an integer number (20617225932).

Almost surely, 2^61851677793 is an apocalyptic number.

It is an amenable number.

61851677793 is a deficient number, since it is larger than the sum of its proper divisors (20617225935).

61851677793 is a wasteful number, since it uses less digits than its factorization.

61851677793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20617225934.

The product of its digits is 13335840, while the sum is 60.

The spelling of 61851677793 in words is "sixty-one billion, eight hundred fifty-one million, six hundred seventy-seven thousand, seven hundred ninety-three".