641514705540 has 96 divisors (see below), whose sum is σ = 1804836996480. Its totient is φ = 170252568576.

The previous prime is 641514705523. The next prime is 641514705541. The reversal of 641514705540 is 45507415146.

It is a super-2 number, since 2×641514705540² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641514705492 and 641514705501.

It is not an unprimeable number, because it can be changed into a prime (641514705541) 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, 38504892 + ... + 38521548.

It is an arithmetic number, because the mean of its divisors is an integer number (18800385380).

Almost surely, 2^641514705540 is an apocalyptic number.

641514705540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641514705540 is an abundant number, since it is smaller than the sum of its proper divisors (1163322290940).

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

641514705540 is a wasteful number, since it uses less digits than its factorization.

641514705540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19701 (or 19699 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 42.

The spelling of 641514705540 in words is "six hundred forty-one billion, five hundred fourteen million, seven hundred five thousand, five hundred forty".