5172554778 has 32 divisors (see below), whose sum is σ = 10834808832. Its totient is φ = 1643122800.

The previous prime is 5172554767. The next prime is 5172554797. The reversal of 5172554778 is 8774552715.

It is a self number, because there is not a number n which added to its sum of digits gives 5172554778.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31758 + ... + 106553.

It is an arithmetic number, because the mean of its divisors is an integer number (338587776).

Almost surely, 2^5172554778 is an apocalyptic number.

5172554778 is an abundant number, since it is smaller than the sum of its proper divisors (5662254054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5172554778 is a wasteful number, since it uses less digits than its factorization.

5172554778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138610.

The product of its digits is 2744000, while the sum is 51.

The square root of 5172554778 is about 71920.4753738461. The cubic root of 5172554778 is about 1729.4248679049.

The spelling of 5172554778 in words is "five billion, one hundred seventy-two million, five hundred fifty-four thousand, seven hundred seventy-eight".