617540020 has 48 divisors (see below), whose sum is σ = 1322556480. Its totient is φ = 242141184.

The previous prime is 617540009. The next prime is 617540023. The reversal of 617540020 is 20045716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617540023) 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, 680407 + ... + 681313.

It is an arithmetic number, because the mean of its divisors is an integer number (27553260).

Almost surely, 2^617540020 is an apocalyptic number.

It is an amenable number.

617540020 is an abundant number, since it is smaller than the sum of its proper divisors (705016460).

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

617540020 is a wasteful number, since it uses less digits than its factorization.

617540020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 617540020 is about 24850.3525125902. The cubic root of 617540020 is about 851.5726456351.

Adding to 617540020 its reverse (20045716), we get a palindrome (637585736).

The spelling of 617540020 in words is "six hundred seventeen million, five hundred forty thousand, twenty".