642461635038 has 16 divisors (see below), whose sum is σ = 1319650926480. Its totient is φ = 208365935616.

The previous prime is 642461635037. The next prime is 642461635091. The reversal of 642461635038 is 830536164246.

It is a super-2 number, since 2×642461635038² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642461635031) 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, 1446985443 + ... + 1446985886.

It is an arithmetic number, because the mean of its divisors is an integer number (82478182905).

Almost surely, 2^642461635038 is an apocalyptic number.

642461635038 is an abundant number, since it is smaller than the sum of its proper divisors (677189291442).

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

642461635038 is a wasteful number, since it uses less digits than its factorization.

642461635038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893971371.

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 642461635038 in words is "six hundred forty-two billion, four hundred sixty-one million, six hundred thirty-five thousand, thirty-eight".