55897739472 has 80 divisors (see below), whose sum is σ = 152568360000. Its totient is φ = 17586220032.

The previous prime is 55897739441. The next prime is 55897739479. The reversal of 55897739472 is 27493779855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55897739479) 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, 131404 + ... + 359252.

It is an arithmetic number, because the mean of its divisors is an integer number (1907104500).

Almost surely, 2^55897739472 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 55897739472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76284180000).

55897739472 is an abundant number, since it is smaller than the sum of its proper divisors (96670620528).

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

55897739472 is a wasteful number, since it uses less digits than its factorization.

55897739472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228148 (or 228142 counting only the distinct ones).

The product of its digits is 133358400, while the sum is 66.

The spelling of 55897739472 in words is "fifty-five billion, eight hundred ninety-seven million, seven hundred thirty-nine thousand, four hundred seventy-two".