642280724615 has 8 divisors (see below), whose sum is σ = 816074332560. Its totient is φ = 483599604352.

The previous prime is 642280724587. The next prime is 642280724633. The reversal of 642280724615 is 516427082246.

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 642280724615 - 2⁶ = 642280724551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 642280724615.

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, 3778121825 + ... + 3778121994.

It is an arithmetic number, because the mean of its divisors is an integer number (102009291570).

Almost surely, 2^642280724615 is an apocalyptic number.

642280724615 is a deficient number, since it is larger than the sum of its proper divisors (173793607945).

642280724615 is a wasteful number, since it uses less digits than its factorization.

642280724615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7556243841.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 642280724615 in words is "six hundred forty-two billion, two hundred eighty million, seven hundred twenty-four thousand, six hundred fifteen".