165401389043 has 16 divisors (see below), whose sum is σ = 188298763776. Its totient is φ = 143815256640.

The previous prime is 165401389039. The next prime is 165401389057. The reversal of 165401389043 is 340983104561.

It is not a de Polignac number, because 165401389043 - 2² = 165401389039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165401388985 and 165401389003.

It is not an unprimeable number, because it can be changed into a prime (165401389093) 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, 4440071 + ... + 4477167.

It is an arithmetic number, because the mean of its divisors is an integer number (11768672736).

Almost surely, 2^165401389043 is an apocalyptic number.

165401389043 is a deficient number, since it is larger than the sum of its proper divisors (22897374733).

165401389043 is a wasteful number, since it uses less digits than its factorization.

165401389043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54754.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 165401389043 in words is "one hundred sixty-five billion, four hundred one million, three hundred eighty-nine thousand, forty-three".