642662216331501 has 8 divisors (see below), whose sum is σ = 856883723834464. Its totient is φ = 428441093191440.

The previous prime is 642662216331461. The next prime is 642662216331539. The reversal of 642662216331501 is 105133612266246.

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

It is not a de Polignac number, because 642662216331501 - 2⁶ = 642662216331437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642662216331581) 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, 92166451 + ... + 98893776.

It is an arithmetic number, because the mean of its divisors is an integer number (107110465479308).

Almost surely, 2^{642662216331501} is an apocalyptic number.

It is an amenable number.

642662216331501 is a deficient number, since it is larger than the sum of its proper divisors (214221507502963).

642662216331501 is a wasteful number, since it uses less digits than its factorization.

642662216331501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192181451.

The product of its (nonzero) digits is 1866240, while the sum is 48.

Adding to 642662216331501 its reverse (105133612266246), we get a palindrome (747795828597747).

The spelling of 642662216331501 in words is "six hundred forty-two trillion, six hundred sixty-two billion, two hundred sixteen million, three hundred thirty-one thousand, five hundred one".