55822764978 has 90 divisors (see below), whose sum is σ = 132149484621. Its totient is φ = 17610198336.

The previous prime is 55822764971. The next prime is 55822764979. The reversal of 55822764978 is 87946722855.

55822764978 is a `hidden beast` number, since 5 + 58 + 22 + 76 + 497 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 41617224009 + 14205540969 = 204003^2 + 119187^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=167067.

It is not an unprimeable number, because it can be changed into a prime (55822764971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 57136426 + ... + 57137402.

Almost surely, 2^55822764978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55822764978

55822764978 is an abundant number, since it is smaller than the sum of its proper divisors (76326719643).

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

55822764978 is an frugal number, since it uses more digits than its factorization.

55822764978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006 (or 1001 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 55822764978 in words is "fifty-five billion, eight hundred twenty-two million, seven hundred sixty-four thousand, nine hundred seventy-eight".