64861811454 has 32 divisors (see below), whose sum is σ = 141525812736. Its totient is φ = 19653825920.

The previous prime is 64861811437. The next prime is 64861811477. The reversal of 64861811454 is 45411816846.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1758934 + ... + 1795430.

It is an arithmetic number, because the mean of its divisors is an integer number (4422681648).

Almost surely, 2^64861811454 is an apocalyptic number.

64861811454 is an abundant number, since it is smaller than the sum of its proper divisors (76664001282).

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

64861811454 is a wasteful number, since it uses less digits than its factorization.

64861811454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63440.

The product of its digits is 737280, while the sum is 48.

The spelling of 64861811454 in words is "sixty-four billion, eight hundred sixty-one million, eight hundred eleven thousand, four hundred fifty-four".