42631302640 has 40 divisors (see below), whose sum is σ = 99198525888. Its totient is φ = 17038629120.

The previous prime is 42631302619. The next prime is 42631302643. The reversal of 42631302640 is 4620313624.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42631302643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117967 + ... + 314926.

Almost surely, 2^42631302640 is an apocalyptic number.

42631302640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42631302640 is an abundant number, since it is smaller than the sum of its proper divisors (56567223248).

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

42631302640 is a wasteful number, since it uses less digits than its factorization.

42631302640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434137 (or 434131 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The spelling of 42631302640 in words is "forty-two billion, six hundred thirty-one million, three hundred two thousand, six hundred forty".