620653694976 has 624 divisors, whose sum is σ = 2139541622400. Its totient is φ = 176101392384.

The previous prime is 620653694953. The next prime is 620653694981. The reversal of 620653694976 is 679496356026.

It is a happy number.

620653694976 is a `hidden beast` number, since 6 + 2 + 0 + 6 + 536 + 9 + 4 + 97 + 6 = 666.

It is a super-2 number, since 2×620653694976² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1595510590 + ... + 1595510978.

It is an arithmetic number, because the mean of its divisors is an integer number (3428752600).

Almost surely, 2^620653694976 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 620653694976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1069770811200).

620653694976 is an abundant number, since it is smaller than the sum of its proper divisors (1518887927424).

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

620653694976 is an equidigital number, since it uses as much as digits as its factorization.

620653694976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 88179840, while the sum is 63.

The spelling of 620653694976 in words is "six hundred twenty billion, six hundred fifty-three million, six hundred ninety-four thousand, nine hundred seventy-six".