642533614 has 4 divisors (see below), whose sum is σ = 963800424. Its totient is φ = 321266806.

The previous prime is 642533611. The next prime is 642533687. The reversal of 642533614 is 416335246.

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

It is a self number, because there is not a number n which added to its sum of digits gives 642533614.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642533611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160633402 + ... + 160633405.

It is an arithmetic number, because the mean of its divisors is an integer number (240950106).

Almost surely, 2^642533614 is an apocalyptic number.

642533614 is a deficient number, since it is larger than the sum of its proper divisors (321266810).

642533614 is a wasteful number, since it uses less digits than its factorization.

642533614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321266809.

The product of its digits is 51840, while the sum is 34.

The square root of 642533614 is about 25348.2467638296. The cubic root of 642533614 is about 862.9095674085.

The spelling of 642533614 in words is "six hundred forty-two million, five hundred thirty-three thousand, six hundred fourteen".