642350537 has 8 divisors (see below), whose sum is σ = 677263200. Its totient is φ = 607548384.

The previous prime is 642350521. The next prime is 642350543. The reversal of 642350537 is 735053246.

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

It is a cyclic number.

It is not a de Polignac number, because 642350537 - 2⁴ = 642350521 is a prime.

It is a super-2 number, since 2×642350537² = 825228424768376738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642350497 and 642350506.

It is not an unprimeable number, because it can be changed into a prime (642350437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15548 + ... + 39069.

It is an arithmetic number, because the mean of its divisors is an integer number (84657900).

Almost surely, 2^642350537 is an apocalyptic number.

It is an amenable number.

642350537 is a deficient number, since it is larger than the sum of its proper divisors (34912663).

642350537 is a wasteful number, since it uses less digits than its factorization.

642350537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55255.

The product of its (nonzero) digits is 75600, while the sum is 35.

The square root of 642350537 is about 25344.6352706051. The cubic root of 642350537 is about 862.8276033949.

The spelling of 642350537 in words is "six hundred forty-two million, three hundred fifty thousand, five hundred thirty-seven".