642052177077 has 16 divisors (see below), whose sum is σ = 877242038400. Its totient is φ = 417455520000.

The previous prime is 642052177069. The next prime is 642052177099. The reversal of 642052177077 is 770771250246.

It is not a de Polignac number, because 642052177077 - 2³ = 642052177069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642052177027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500577 + ... + 1238822.

It is an arithmetic number, because the mean of its divisors is an integer number (54827627400).

Almost surely, 2^642052177077 is an apocalyptic number.

It is an amenable number.

642052177077 is a deficient number, since it is larger than the sum of its proper divisors (235189861323).

642052177077 is a wasteful number, since it uses less digits than its factorization.

642052177077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742444.

The product of its (nonzero) digits is 1152480, while the sum is 48.

The spelling of 642052177077 in words is "six hundred forty-two billion, fifty-two million, one hundred seventy-seven thousand, seventy-seven".