617354728620 has 96 divisors (see below), whose sum is σ = 2061427995648. Its totient is φ = 134974447872.

The previous prime is 617354728583. The next prime is 617354728621. The reversal of 617354728620 is 26827453716.

It is a happy number.

It is a super-2 number, since 2×617354728620² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (617354728621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31944519 + ... + 31963838.

It is an arithmetic number, because the mean of its divisors is an integer number (21473208288).

Almost surely, 2^617354728620 is an apocalyptic number.

617354728620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

617354728620 is an abundant number, since it is smaller than the sum of its proper divisors (1444073267028).

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

617354728620 is a wasteful number, since it uses less digits than its factorization.

617354728620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63908399 (or 63908397 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 617354728620 in words is "six hundred seventeen billion, three hundred fifty-four million, seven hundred twenty-eight thousand, six hundred twenty".