55791978496 has 192 divisors, whose sum is σ = 122594472000. Its totient is φ = 25279070208.

The previous prime is 55791978493. The next prime is 55791978509. The reversal of 55791978496 is 69487919755.

It is a super-2 number, since 2×55791978496² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55791978493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124258080 + ... + 124258528.

It is an arithmetic number, because the mean of its divisors is an integer number (638512875).

Almost surely, 2^55791978496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55791978496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61297236000).

55791978496 is an abundant number, since it is smaller than the sum of its proper divisors (66802493504).

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

55791978496 is a wasteful number, since it uses less digits than its factorization.

55791978496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 594 counting only the distinct ones).

The product of its digits is 171460800, while the sum is 70.

The spelling of 55791978496 in words is "fifty-five billion, seven hundred ninety-one million, nine hundred seventy-eight thousand, four hundred ninety-six".