631621513077 has 8 divisors (see below), whose sum is σ = 842395124064. Its totient is φ = 420964455408.

The previous prime is 631621512983. The next prime is 631621513093. The reversal of 631621513077 is 770315126136.

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

It is not a de Polignac number, because 631621513077 - 2²³ = 631613124469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631621513277) 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 7 ways as a sum of consecutive naturals, for example, 29125683 + ... + 29147360.

It is an arithmetic number, because the mean of its divisors is an integer number (105299390508).

Almost surely, 2^631621513077 is an apocalyptic number.

It is an amenable number.

631621513077 is a deficient number, since it is larger than the sum of its proper divisors (210773610987).

631621513077 is a wasteful number, since it uses less digits than its factorization.

631621513077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58276659.

The product of its (nonzero) digits is 158760, while the sum is 42.

The spelling of 631621513077 in words is "six hundred thirty-one billion, six hundred twenty-one million, five hundred thirteen thousand, seventy-seven".