165373397904 has 240 divisors, whose sum is σ = 506926572480. Its totient is φ = 46050600960.

The previous prime is 165373397887. The next prime is 165373397939. The reversal of 165373397904 is 409793373561.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20430082 + ... + 20438174.

It is an arithmetic number, because the mean of its divisors is an integer number (2112194052).

Almost surely, 2^165373397904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165373397904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253463286240).

165373397904 is an abundant number, since it is smaller than the sum of its proper divisors (341553174576).

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

165373397904 is a wasteful number, since it uses less digits than its factorization.

165373397904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8370 (or 8351 counting only the distinct ones).

The product of its (nonzero) digits is 12859560, while the sum is 57.

The spelling of 165373397904 in words is "one hundred sixty-five billion, three hundred seventy-three million, three hundred ninety-seven thousand, nine hundred four".