620626764745 has 16 divisors (see below), whose sum is σ = 803758213440. Its totient is φ = 457327583424.

The previous prime is 620626764743. The next prime is 620626764749. The reversal of 620626764745 is 547467626026.

It is a cyclic number.

It is not a de Polignac number, because 620626764745 - 2¹ = 620626764743 is a prime.

It is a super-2 number, since 2×620626764745² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (620626764743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10192455 + ... + 10253164.

It is an arithmetic number, because the mean of its divisors is an integer number (50234888340).

Almost surely, 2^620626764745 is an apocalyptic number.

620626764745 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

620626764745 is a deficient number, since it is larger than the sum of its proper divisors (183131448695).

620626764745 is a wasteful number, since it uses less digits than its factorization.

620626764745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20446104.

The product of its (nonzero) digits is 20321280, while the sum is 55.

The spelling of 620626764745 in words is "six hundred twenty billion, six hundred twenty-six million, seven hundred sixty-four thousand, seven hundred forty-five".