47772777505 has 4 divisors (see below), whose sum is σ = 57327333012. Its totient is φ = 38218222000.

The previous prime is 47772777469. The next prime is 47772777527. The reversal of 47772777505 is 50577727774.

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 28409776704 + 19363000801 = 168552^2 + 139151^2 .

It is not a de Polignac number, because 47772777505 - 2⁹ = 47772776993 is a prime.

It is a super-3 number, since 3×47772777505³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47772777505.

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, 4777277746 + ... + 4777277755.

It is an arithmetic number, because the mean of its divisors is an integer number (14331833253).

Almost surely, 2^47772777505 is an apocalyptic number.

It is an amenable number.

47772777505 is a deficient number, since it is larger than the sum of its proper divisors (9554555507).

47772777505 is an equidigital number, since it uses as much as digits as its factorization.

47772777505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9554555506.

The product of its (nonzero) digits is 23529800, while the sum is 58.

The spelling of 47772777505 in words is "forty-seven billion, seven hundred seventy-two million, seven hundred seventy-seven thousand, five hundred five".