642612662151 has 8 divisors (see below), whose sum is σ = 875047029504. Its totient is φ = 419293368120.

The previous prime is 642612662147. The next prime is 642612662179. The reversal of 642612662151 is 151266216246.

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

It is not a de Polignac number, because 642612662151 - 2² = 642612662147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642612661151) 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, 2278768165 + ... + 2278768446.

It is an arithmetic number, because the mean of its divisors is an integer number (109380878688).

Almost surely, 2^642612662151 is an apocalyptic number.

642612662151 is a deficient number, since it is larger than the sum of its proper divisors (232434367353).

642612662151 is a wasteful number, since it uses less digits than its factorization.

642612662151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557536661.

The product of its digits is 207360, while the sum is 42.

Adding to 642612662151 its reverse (151266216246), we get a palindrome (793878878397).

The spelling of 642612662151 in words is "six hundred forty-two billion, six hundred twelve million, six hundred sixty-two thousand, one hundred fifty-one".