620644234090608 has 720 divisors, whose sum is σ = 2187079206888576. Its totient is φ = 162849718563840.

The previous prime is 620644234090579. The next prime is 620644234090637. The reversal of 620644234090608 is 806090432446026.

620644234090608 is a `hidden beast` number, since 6 + 2 + 0 + 6 + 4 + 4 + 23 + 4 + 0 + 9 + 0 + 608 = 666.

It is an interprime number because it is at equal distance from previous prime (620644234090579) and next prime (620644234090637).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 77941002435 + ... + 77941010397.

Almost surely, 2^{620644234090608} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620644234090608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093539603444288).

620644234090608 is an abundant number, since it is smaller than the sum of its proper divisors (1566434972797968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620644234090608 is a wasteful number, since it uses less digits than its factorization.

620644234090608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12242 (or 12226 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 54.

The spelling of 620644234090608 in words is "six hundred twenty trillion, six hundred forty-four billion, two hundred thirty-four million, ninety thousand, six hundred eight".