642632534 has 8 divisors (see below), whose sum is σ = 964062000. Its totient is φ = 321278536.

The previous prime is 642632527. The next prime is 642632567. The reversal of 642632534 is 435236246.

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

It is a super-2 number, since 2×642632534² = 825953147510522312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 642632494 and 642632503.

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, 13592 + ... + 38340.

It is an arithmetic number, because the mean of its divisors is an integer number (120507750).

Almost surely, 2^642632534 is an apocalyptic number.

642632534 is a deficient number, since it is larger than the sum of its proper divisors (321429466).

642632534 is a wasteful number, since it uses less digits than its factorization.

642632534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37734.

The product of its digits is 103680, while the sum is 35.

The square root of 642632534 is about 25350.1979084977. The cubic root of 642632534 is about 862.9538476518.

The spelling of 642632534 in words is "six hundred forty-two million, six hundred thirty-two thousand, five hundred thirty-four".