642525065454 has 16 divisors (see below), whose sum is σ = 1285059904848. Its totient is φ = 214173392832.

The previous prime is 642525065449. The next prime is 642525065491. The reversal of 642525065454 is 454560525246.

It is a super-2 number, since 2×642525065454² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664194 + ... + 1313850.

It is an arithmetic number, because the mean of its divisors is an integer number (80316244053).

Almost surely, 2^642525065454 is an apocalyptic number.

642525065454 is an abundant number, since it is smaller than the sum of its proper divisors (642534839394).

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

642525065454 is a wasteful number, since it uses less digits than its factorization.

642525065454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814499.

The product of its (nonzero) digits is 5760000, while the sum is 48.

The spelling of 642525065454 in words is "six hundred forty-two billion, five hundred twenty-five million, sixty-five thousand, four hundred fifty-four".