7714685641638 has 64 divisors (see below), whose sum is σ = 16733818252800. Its totient is φ = 2363393260800.

The previous prime is 7714685641627. The next prime is 7714685641639. The reversal of 7714685641638 is 8361465864177.

It is a super-3 number, since 3×7714685641638³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7714685641639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6635538 + ... + 7711013.

It is an arithmetic number, because the mean of its divisors is an integer number (261465910200).

Almost surely, 2^{7714685641638} is an apocalyptic number.

7714685641638 is an abundant number, since it is smaller than the sum of its proper divisors (9019132611162).

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

7714685641638 is a wasteful number, since it uses less digits than its factorization.

7714685641638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14346717.

The product of its digits is 162570240, while the sum is 66.

The spelling of 7714685641638 in words is "seven trillion, seven hundred fourteen billion, six hundred eighty-five million, six hundred forty-one thousand, six hundred thirty-eight".