38956772405 has 4 divisors (see below), whose sum is σ = 46748126892. Its totient is φ = 31165417920.

The previous prime is 38956772357. The next prime is 38956772423. The reversal of 38956772405 is 50427765983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21774543844 + 17182228561 = 147562^2 + 131081^2 .

It is not a de Polignac number, because 38956772405 - 2¹² = 38956768309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3895677236 + ... + 3895677245.

It is an arithmetic number, because the mean of its divisors is an integer number (11687031723).

Almost surely, 2^38956772405 is an apocalyptic number.

It is an amenable number.

38956772405 is a deficient number, since it is larger than the sum of its proper divisors (7791354487).

38956772405 is an equidigital number, since it uses as much as digits as its factorization.

38956772405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7791354486.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 38956772405 in words is "thirty-eight billion, nine hundred fifty-six million, seven hundred seventy-two thousand, four hundred five".