52640881777 has 4 divisors (see below), whose sum is σ = 57426416496. Its totient is φ = 47855347060.

The previous prime is 52640881763. The next prime is 52640881817. The reversal of 52640881777 is 77718804625.

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 52640881777 - 2²³ = 52632493169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52640881717) 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, 2392767343 + ... + 2392767364.

It is an arithmetic number, because the mean of its divisors is an integer number (14356604124).

Almost surely, 2^52640881777 is an apocalyptic number.

It is an amenable number.

52640881777 is a deficient number, since it is larger than the sum of its proper divisors (4785534719).

52640881777 is a wasteful number, since it uses less digits than its factorization.

52640881777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4785534718.

The product of its (nonzero) digits is 5268480, while the sum is 55.

The spelling of 52640881777 in words is "fifty-two billion, six hundred forty million, eight hundred eighty-one thousand, seven hundred seventy-seven".