2165536155401 has 8 divisors (see below), whose sum is σ = 2291516521344. Its totient is φ = 2042208007840.

The previous prime is 2165536155389. The next prime is 2165536155407. The reversal of 2165536155401 is 1045516355612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2165536155401 - 2²² = 2165531961097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165536155407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663052916 + ... + 663056181.

It is an arithmetic number, because the mean of its divisors is an integer number (286439565168).

Almost surely, 2^{2165536155401} is an apocalyptic number.

It is an amenable number.

2165536155401 is a deficient number, since it is larger than the sum of its proper divisors (125980365943).

2165536155401 is a wasteful number, since it uses less digits than its factorization.

2165536155401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326109191.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 2165536155401 in words is "two trillion, one hundred sixty-five billion, five hundred thirty-six million, one hundred fifty-five thousand, four hundred one".