538776131021782 has 16 divisors (see below), whose sum is σ = 814115064082320. Its totient is φ = 267405094121472.

The previous prime is 538776131021699. The next prime is 538776131021813. The reversal of 538776131021782 is 287120131677835.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 538776131021782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161123803 + ... + 164433670.

It is an arithmetic number, because the mean of its divisors is an integer number (50882191505145).

Almost surely, 2^{538776131021782} is an apocalyptic number.

538776131021782 is a deficient number, since it is larger than the sum of its proper divisors (275338933060538).

538776131021782 is a wasteful number, since it uses less digits than its factorization.

538776131021782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325563567.

The product of its (nonzero) digits is 23708160, while the sum is 61.

The spelling of 538776131021782 in words is "five hundred thirty-eight trillion, seven hundred seventy-six billion, one hundred thirty-one million, twenty-one thousand, seven hundred eighty-two".