642632700454 has 4 divisors (see below), whose sum is σ = 963949050684. Its totient is φ = 321316350226.

The previous prime is 642632700427. The next prime is 642632700461. The reversal of 642632700454 is 454007236246.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×642632700454² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642632700454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160658175112 + ... + 160658175115.

It is an arithmetic number, because the mean of its divisors is an integer number (240987262671).

Almost surely, 2^642632700454 is an apocalyptic number.

642632700454 is a deficient number, since it is larger than the sum of its proper divisors (321316350230).

642632700454 is a wasteful number, since it uses less digits than its factorization.

642632700454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321316350229.

The product of its (nonzero) digits is 967680, while the sum is 43.

The spelling of 642632700454 in words is "six hundred forty-two billion, six hundred thirty-two million, seven hundred thousand, four hundred fifty-four".