641502157480 has 32 divisors (see below), whose sum is σ = 1443626650440. Its totient is φ = 256556988160.

The previous prime is 641502157469. The next prime is 641502157481. The reversal of 641502157480 is 84751205146.

It can be written as a sum of positive squares in 4 ways, for example, as 505398715396 + 136103442084 = 710914^2 + 368922^2 .

It is not an unprimeable number, because it can be changed into a prime (641502157481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1133719 + ... + 1602598.

Almost surely, 2^641502157480 is an apocalyptic number.

It is an amenable number.

641502157480 is an abundant number, since it is smaller than the sum of its proper divisors (802124492960).

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

641502157480 is a wasteful number, since it uses less digits than its factorization.

641502157480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742189 (or 2742185 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 641502157480 in words is "six hundred forty-one billion, five hundred two million, one hundred fifty-seven thousand, four hundred eighty".