641178480 has 40 divisors (see below), whose sum is σ = 1987654032. Its totient is φ = 170980864.

The previous prime is 641178479. The next prime is 641178481. The reversal of 641178480 is 84871146.

It is an interprime number because it is at equal distance from previous prime (641178479) and next prime (641178481).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×641178480² = 822219686430220800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641178481) 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, 1335549 + ... + 1336028.

Almost surely, 2^641178480 is an apocalyptic number.

641178480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641178480 is an abundant number, since it is smaller than the sum of its proper divisors (1346475552).

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

641178480 is a wasteful number, since it uses less digits than its factorization.

641178480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671593 (or 2671587 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 641178480 is about 25321.5023250991. The cubic root of 641178480 is about 862.3025013033.

The spelling of 641178480 in words is "six hundred forty-one million, one hundred seventy-eight thousand, four hundred eighty".