642046676477 has 4 divisors (see below), whose sum is σ = 642077938656. Its totient is φ = 642015414300.

The previous prime is 642046676471. The next prime is 642046676483. The reversal of 642046676477 is 774676640246.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (642046676471) and next prime (642046676483).

It is a cyclic number.

It is not a de Polignac number, because 642046676477 - 2⁸ = 642046676221 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 (642046676471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15600263 + ... + 15641364.

It is an arithmetic number, because the mean of its divisors is an integer number (160519484664).

Almost surely, 2^642046676477 is an apocalyptic number.

It is an amenable number.

642046676477 is a deficient number, since it is larger than the sum of its proper divisors (31262179).

642046676477 is a wasteful number, since it uses less digits than its factorization.

642046676477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31262178.

The product of its (nonzero) digits is 56899584, while the sum is 59.

The spelling of 642046676477 in words is "six hundred forty-two billion, forty-six million, six hundred seventy-six thousand, four hundred seventy-seven".