620548873631 has 4 divisors (see below), whose sum is σ = 640566579264. Its totient is φ = 600531168000.

The previous prime is 620548873613. The next prime is 620548873639. The reversal of 620548873631 is 136378845026.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620548873631 is a prime.

It is a super-2 number, since 2×620548873631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620548873639) 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, 10008852770 + ... + 10008852831.

It is an arithmetic number, because the mean of its divisors is an integer number (160141644816).

Almost surely, 2^620548873631 is an apocalyptic number.

620548873631 is a deficient number, since it is larger than the sum of its proper divisors (20017705633).

620548873631 is a wasteful number, since it uses less digits than its factorization.

620548873631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20017705632.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 620548873631 in words is "six hundred twenty billion, five hundred forty-eight million, eight hundred seventy-three thousand, six hundred thirty-one".