154891972858 has 32 divisors (see below), whose sum is σ = 267396220800. Its totient is φ = 65915778240.

The previous prime is 154891972853. The next prime is 154891972861. The reversal of 154891972858 is 858279198451.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 154891972793 and 154891972802.

It is not an unprimeable number, because it can be changed into a prime (154891972853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7777093 + ... + 7796983.

It is an arithmetic number, because the mean of its divisors is an integer number (8356131900).

Almost surely, 2^154891972858 is an apocalyptic number.

154891972858 is a deficient number, since it is larger than the sum of its proper divisors (112504247942).

154891972858 is a wasteful number, since it uses less digits than its factorization.

154891972858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23782.

The product of its digits is 58060800, while the sum is 67.

The spelling of 154891972858 in words is "one hundred fifty-four billion, eight hundred ninety-one million, nine hundred seventy-two thousand, eight hundred fifty-eight".