1617640138 has 16 divisors (see below), whose sum is σ = 2450606400. Its totient is φ = 800800000.

The previous prime is 1617640127. The next prime is 1617640147. The reversal of 1617640138 is 8310467161.

It is a super-3 number, since 3×1617640138³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1617640097 and 1617640106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110763 + ... + 124513.

It is an arithmetic number, because the mean of its divisors is an integer number (153162900).

Almost surely, 2^1617640138 is an apocalyptic number.

1617640138 is a deficient number, since it is larger than the sum of its proper divisors (832966262).

1617640138 is a wasteful number, since it uses less digits than its factorization.

1617640138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14333.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1617640138 is about 40219.8972897744. The cubic root of 1617640138 is about 1173.8897345135.

The spelling of 1617640138 in words is "one billion, six hundred seventeen million, six hundred forty thousand, one hundred thirty-eight".