64547737512 has 32 divisors (see below), whose sum is σ = 170861659200. Its totient is φ = 20250270464.

The previous prime is 64547737493. The next prime is 64547737519. The reversal of 64547737512 is 21573774546.

64547737512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (64547737519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79102212 + ... + 79103027.

It is an arithmetic number, because the mean of its divisors is an integer number (5339426850).

Almost surely, 2^64547737512 is an apocalyptic number.

It is an amenable number.

64547737512 is an abundant number, since it is smaller than the sum of its proper divisors (106313921688).

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

64547737512 is a wasteful number, since it uses less digits than its factorization.

64547737512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158205265 (or 158205261 counting only the distinct ones).

The product of its digits is 4939200, while the sum is 51.

The spelling of 64547737512 in words is "sixty-four billion, five hundred forty-seven million, seven hundred thirty-seven thousand, five hundred twelve".