620864442461 has 12 divisors (see below), whose sum is σ = 661060181052. Its totient is φ = 582982130304.

The previous prime is 620864442433. The next prime is 620864442467. The reversal of 620864442461 is 164244468026.

It can be written as a sum of positive squares in 2 ways, for example, as 21548478436 + 599315964025 = 146794^2 + 774155^2 .

It is not a de Polignac number, because 620864442461 - 2³⁴ = 603684573277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620864442467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7569146 + ... + 7650731.

It is an arithmetic number, because the mean of its divisors is an integer number (55088348421).

Almost surely, 2^620864442461 is an apocalyptic number.

It is an amenable number.

620864442461 is a deficient number, since it is larger than the sum of its proper divisors (40195738591).

620864442461 is a wasteful number, since it uses less digits than its factorization.

620864442461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15220028 (or 15220009 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 47.

The spelling of 620864442461 in words is "six hundred twenty billion, eight hundred sixty-four million, four hundred forty-two thousand, four hundred sixty-one".