642306738155 has 16 divisors (see below), whose sum is σ = 779064900768. Its totient is φ = 508322880000.

The previous prime is 642306738103. The next prime is 642306738209. The reversal of 642306738155 is 551837603246.

It is not a de Polignac number, because 642306738155 - 2²² = 642302543851 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48275 + ... + 1134435.

It is an arithmetic number, because the mean of its divisors is an integer number (48691556298).

Almost surely, 2^642306738155 is an apocalyptic number.

642306738155 is a deficient number, since it is larger than the sum of its proper divisors (136758162613).

642306738155 is a wasteful number, since it uses less digits than its factorization.

642306738155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087438.

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 642306738155 in words is "six hundred forty-two billion, three hundred six million, seven hundred thirty-eight thousand, one hundred fifty-five".