618161922 has 256 divisors, whose sum is σ = 1799884800. Its totient is φ = 153031680.

The previous prime is 618161897. The next prime is 618161933. The reversal of 618161922 is 229161816.

618161922 is a `hidden beast` number, since 6 + 18 + 1 + 619 + 22 = 666.

Its product of digits (10368) is a multiple of the sum of its prime divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7447693 + ... + 7447775.

It is an arithmetic number, because the mean of its divisors is an integer number (7030800).

Almost surely, 2^618161922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618161922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (899942400).

618161922 is an abundant number, since it is smaller than the sum of its proper divisors (1181722878).

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

618161922 is a wasteful number, since it uses less digits than its factorization.

618161922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 192 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 618161922 is about 24862.8623050525. The cubic root of 618161922 is about 851.8584122981.

The spelling of 618161922 in words is "six hundred eighteen million, one hundred sixty-one thousand, nine hundred twenty-two".