2617321640 has 32 divisors (see below), whose sum is σ = 5892480000. Its totient is φ = 1046305344.

The previous prime is 2617321627. The next prime is 2617321643. The reversal of 2617321640 is 461237162.

It is a junction number, because it is equal to n+sod(n) for n = 2617321597 and 2617321606.

It is not an unprimeable number, because it can be changed into a prime (2617321643) 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, 51761 + ... + 88959.

It is an arithmetic number, because the mean of its divisors is an integer number (184140000).

Almost surely, 2^2617321640 is an apocalyptic number.

2617321640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2617321640 is an abundant number, since it is smaller than the sum of its proper divisors (3275158360).

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

2617321640 is a wasteful number, since it uses less digits than its factorization.

2617321640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38969 (or 38965 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 2617321640 is about 51159.7658321459. The cubic root of 2617321640 is about 1378.1157579229.

The spelling of 2617321640 in words is "two billion, six hundred seventeen million, three hundred twenty-one thousand, six hundred forty".