165406400137 has 16 divisors (see below), whose sum is σ = 186335170560. Its totient is φ = 145463302800.

The previous prime is 165406400111. The next prime is 165406400161. The reversal of 165406400137 is 731004604561.

It is a cyclic number.

It is not a de Polignac number, because 165406400137 - 2¹⁵ = 165406367369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165406400096 and 165406400105.

It is not an unprimeable number, because it can be changed into a prime (165406410137) 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, 815508 + ... + 997930.

It is an arithmetic number, because the mean of its divisors is an integer number (11645948160).

Almost surely, 2^165406400137 is an apocalyptic number.

It is an amenable number.

165406400137 is a deficient number, since it is larger than the sum of its proper divisors (20928770423).

165406400137 is a wasteful number, since it uses less digits than its factorization.

165406400137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185124.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 165406400137 in words is "one hundred sixty-five billion, four hundred six million, four hundred thousand, one hundred thirty-seven".