47778470457 has 4 divisors (see below), whose sum is σ = 63704627280. Its totient is φ = 31852313636.

The previous prime is 47778470387. The next prime is 47778470477. The reversal of 47778470457 is 75407487774.

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 47778470457 - 2⁷ = 47778470329 is a prime.

It is a super-3 number, since 3×47778470457³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47778470457.

It is not an unprimeable number, because it can be changed into a prime (47778470477) 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, 7963078407 + ... + 7963078412.

It is an arithmetic number, because the mean of its divisors is an integer number (15926156820).

Almost surely, 2^47778470457 is an apocalyptic number.

It is an amenable number.

47778470457 is a deficient number, since it is larger than the sum of its proper divisors (15926156823).

47778470457 is a wasteful number, since it uses less digits than its factorization.

47778470457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15926156822.

The product of its (nonzero) digits is 43025920, while the sum is 60.

The spelling of 47778470457 in words is "forty-seven billion, seven hundred seventy-eight million, four hundred seventy thousand, four hundred fifty-seven".