64973118405 has 128 divisors (see below), whose sum is σ = 117426516480. Its totient is φ = 30468096000.

The previous prime is 64973118403. The next prime is 64973118407. The reversal of 64973118405 is 50481137946.

64973118405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64973118403) and next prime (64973118407).

It is not a de Polignac number, because 64973118405 - 2¹ = 64973118403 is a prime.

It is a super-2 number, since 2×64973118405² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64973118401) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 85378225 + ... + 85378985.

It is an arithmetic number, because the mean of its divisors is an integer number (917394660).

Almost surely, 2^64973118405 is an apocalyptic number.

64973118405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64973118405 is a deficient number, since it is larger than the sum of its proper divisors (52453398075).

64973118405 is a wasteful number, since it uses less digits than its factorization.

64973118405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 64973118405 in words is "sixty-four billion, nine hundred seventy-three million, one hundred eighteen thousand, four hundred five".