620253081520 has 40 divisors (see below), whose sum is σ = 1488607401600. Its totient is φ = 240097966080.

The previous prime is 620253081473. The next prime is 620253081521. The reversal of 620253081520 is 25180352026.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (620253081521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125048545 + ... + 125053504.

It is an arithmetic number, because the mean of its divisors is an integer number (37215185040).

Almost surely, 2^620253081520 is an apocalyptic number.

It is an amenable number.

620253081520 is an abundant number, since it is smaller than the sum of its proper divisors (868354320080).

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

620253081520 is a wasteful number, since it uses less digits than its factorization.

620253081520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250102093 (or 250102087 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 620253081520 in words is "six hundred twenty billion, two hundred fifty-three million, eighty-one thousand, five hundred twenty".