64784460738 has 32 divisors (see below), whose sum is σ = 137153966400. Its totient is φ = 20365281216.

The previous prime is 64784460737. The next prime is 64784460739. The reversal of 64784460738 is 83706448746.

It is an interprime number because it is at equal distance from previous prime (64784460737) and next prime (64784460739).

It is a super-2 number, since 2×64784460738² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64784460737) by changing a digit.

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, 4321873 + ... + 4336836.

It is an arithmetic number, because the mean of its divisors is an integer number (4286061450).

Almost surely, 2^64784460738 is an apocalyptic number.

64784460738 is an abundant number, since it is smaller than the sum of its proper divisors (72369505662).

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

64784460738 is a wasteful number, since it uses less digits than its factorization.

64784460738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8658786.

The product of its (nonzero) digits is 21676032, while the sum is 57.

The spelling of 64784460738 in words is "sixty-four billion, seven hundred eighty-four million, four hundred sixty thousand, seven hundred thirty-eight".