978772554 has 48 divisors (see below), whose sum is σ = 2153848320. Its totient is φ = 321179040.

The previous prime is 978772547. The next prime is 978772607. The reversal of 978772554 is 455277879.

It is a happy number.

978772554 is a `hidden beast` number, since 9 + 7 + 87 + 7 + 2 + 554 = 666.

978772554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 978772554.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 612084 + ... + 613680.

It is an arithmetic number, because the mean of its divisors is an integer number (44871840).

Almost surely, 2^978772554 is an apocalyptic number.

978772554 is an abundant number, since it is smaller than the sum of its proper divisors (1175075766).

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

978772554 is a wasteful number, since it uses less digits than its factorization.

978772554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115 (or 2112 counting only the distinct ones).

The product of its digits is 4939200, while the sum is 54.

The square root of 978772554 is about 31285.3408803548. The cubic root of 978772554 is about 992.8735185727.

The spelling of 978772554 in words is "nine hundred seventy-eight million, seven hundred seventy-two thousand, five hundred fifty-four".