64547460690 has 32 divisors (see below), whose sum is σ = 154961674560. Its totient is φ = 17207348544.

The previous prime is 64547460689. The next prime is 64547460697. The reversal of 64547460690 is 9606474546.

It is a super-2 number, since 2×64547460690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64547460697) 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, 232329 + ... + 427868.

It is an arithmetic number, because the mean of its divisors is an integer number (4842552330).

Almost surely, 2^64547460690 is an apocalyptic number.

64547460690 is an abundant number, since it is smaller than the sum of its proper divisors (90414213870).

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

64547460690 is a wasteful number, since it uses less digits than its factorization.

64547460690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663466.

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 64547460690 in words is "sixty-four billion, five hundred forty-seven million, four hundred sixty thousand, six hundred ninety".