4640721127064 has 16 divisors (see below), whose sum is σ = 9492384123720. Its totient is φ = 2109418694080.

The previous prime is 4640721126997. The next prime is 4640721127067. The reversal of 4640721127064 is 4607211270464.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4640721127067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26367733589 + ... + 26367733764.

Almost surely, 2^{4640721127064} is an apocalyptic number.

4640721127064 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

4640721127064 is an abundant number, since it is smaller than the sum of its proper divisors (4851662996656).

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

4640721127064 is a wasteful number, since it uses less digits than its factorization.

4640721127064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52735467370 (or 52735467366 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 44.

The spelling of 4640721127064 in words is "four trillion, six hundred forty billion, seven hundred twenty-one million, one hundred twenty-seven thousand, sixty-four".