165930738078 has 32 divisors (see below), whose sum is σ = 381541353984. Its totient is φ = 47124895392.

The previous prime is 165930738073. The next prime is 165930738097. The reversal of 165930738078 is 870837039561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165930738073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11821525 + ... + 11835552.

It is an arithmetic number, because the mean of its divisors is an integer number (11923167312).

Almost surely, 2^165930738078 is an apocalyptic number.

165930738078 is an abundant number, since it is smaller than the sum of its proper divisors (215610615906).

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

165930738078 is a wasteful number, since it uses less digits than its factorization.

165930738078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23657256.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 165930738078 in words is "one hundred sixty-five billion, nine hundred thirty million, seven hundred thirty-eight thousand, seventy-eight".