642400015126 has 8 divisors (see below), whose sum is σ = 963603498240. Its totient is φ = 321198849048.

The previous prime is 642400015099. The next prime is 642400015139. The reversal of 642400015126 is 621510004246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569515 + ... + 1268521.

It is an arithmetic number, because the mean of its divisors is an integer number (120450437280).

Almost surely, 2^642400015126 is an apocalyptic number.

642400015126 is a deficient number, since it is larger than the sum of its proper divisors (321203483114).

642400015126 is a wasteful number, since it uses less digits than its factorization.

642400015126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158518.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 642400015126 in words is "six hundred forty-two billion, four hundred million, fifteen thousand, one hundred twenty-six".