38165194440 has 160 divisors (see below), whose sum is σ = 133855001280. Its totient is φ = 9734871168.

The previous prime is 38165194439. The next prime is 38165194469. The reversal of 38165194440 is 4449156183.

38165194440 is a `hidden beast` number, since 3 + 8 + 16 + 5 + 194 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 181554 + ... + 330593.

It is an arithmetic number, because the mean of its divisors is an integer number (836593758).

Almost surely, 2^38165194440 is an apocalyptic number.

38165194440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38165194440 is an abundant number, since it is smaller than the sum of its proper divisors (95689806840).

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

38165194440 is a wasteful number, since it uses less digits than its factorization.

38165194440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512193 (or 512180 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 38165194440 in words is "thirty-eight billion, one hundred sixty-five million, one hundred ninety-four thousand, four hundred forty".