154100166634421 has 32 divisors (see below), whose sum is σ = 180586219419648. Its totient is φ = 128766231996480.

The previous prime is 154100166634363. The next prime is 154100166634457. The reversal of 154100166634421 is 124436661001451.

It is a cyclic number.

It is not a de Polignac number, because 154100166634421 - 2⁶ = 154100166634357 is a prime.

It is a super-2 number, since 2×154100166634421² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154100166634621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40542266 + ... + 44180036.

It is an arithmetic number, because the mean of its divisors is an integer number (5643319356864).

Almost surely, 2^{154100166634421} is an apocalyptic number.

It is an amenable number.

154100166634421 is a deficient number, since it is larger than the sum of its proper divisors (26486052785227).

154100166634421 is a wasteful number, since it uses less digits than its factorization.

154100166634421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638561.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 154100166634421 in words is "one hundred fifty-four trillion, one hundred billion, one hundred sixty-six million, six hundred thirty-four thousand, four hundred twenty-one".