55387970064 has 180 divisors, whose sum is σ = 180689886000. Its totient is φ = 15792416640.

The previous prime is 55387970063. The next prime is 55387970081. The reversal of 55387970064 is 46007978355.

55387970064 is a `hidden beast` number, since 553 + 87 + 9 + 7 + 0 + 0 + 6 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (55387970063) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3513079 + ... + 3528809.

It is an arithmetic number, because the mean of its divisors is an integer number (1003832700).

Almost surely, 2^55387970064 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 55387970064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90344943000).

55387970064 is an abundant number, since it is smaller than the sum of its proper divisors (125301915936).

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

55387970064 is a wasteful number, since it uses less digits than its factorization.

55387970064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16258 (or 16242 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 55387970064 in words is "fifty-five billion, three hundred eighty-seven million, nine hundred seventy thousand, sixty-four".