642633151005 has 20 divisors (see below), whose sum is σ = 1151979426972. Its totient is φ = 342737680320.

The previous prime is 642633151001. The next prime is 642633151021. The reversal of 642633151005 is 500151336246.

642633151005 is a `hidden beast` number, since 6 + 4 + 2 + 633 + 1 + 5 + 10 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 438940700676 + 203692450329 = 662526^2 + 451323^2 .

It is not a de Polignac number, because 642633151005 - 2² = 642633151001 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642633151001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 793373856 + ... + 793374665.

Almost surely, 2^642633151005 is an apocalyptic number.

It is an amenable number.

642633151005 is a deficient number, since it is larger than the sum of its proper divisors (509346275967).

642633151005 is a wasteful number, since it uses less digits than its factorization.

642633151005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586748538 (or 1586748529 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 642633151005 in words is "six hundred forty-two billion, six hundred thirty-three million, one hundred fifty-one thousand, five".