7920405061 has 4 divisors (see below), whose sum is σ = 8015831712. Its totient is φ = 7824978412.

The previous prime is 7920405049. The next prime is 7920405089. The reversal of 7920405061 is 1605040297.

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 7920405061 - 2⁵ = 7920405029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7920405011) 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, 47713201 + ... + 47713366.

It is an arithmetic number, because the mean of its divisors is an integer number (2003957928).

Almost surely, 2^7920405061 is an apocalyptic number.

It is an amenable number.

7920405061 is a deficient number, since it is larger than the sum of its proper divisors (95426651).

7920405061 is an equidigital number, since it uses as much as digits as its factorization.

7920405061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95426650.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 7920405061 is about 88996.6575833048. The cubic root of 7920405061 is about 1993.3449682552.

The spelling of 7920405061 in words is "seven billion, nine hundred twenty million, four hundred five thousand, sixty-one".