154999149481859 has 4 divisors (see below), whose sum is σ = 161738242937616. Its totient is φ = 148260056026104.

The previous prime is 154999149481849. The next prime is 154999149481871. The reversal of 154999149481859 is 958184941999451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154999149481859 is a prime.

It is a super-2 number, since 2×154999149481859² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154999149481829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3369546727844 + ... + 3369546727889.

It is an arithmetic number, because the mean of its divisors is an integer number (40434560734404).

Almost surely, 2^{154999149481859} is an apocalyptic number.

154999149481859 is a deficient number, since it is larger than the sum of its proper divisors (6739093455757).

154999149481859 is an equidigital number, since it uses as much as digits as its factorization.

154999149481859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6739093455756.

The product of its digits is 6046617600, while the sum is 86.

The spelling of 154999149481859 in words is "one hundred fifty-four trillion, nine hundred ninety-nine billion, one hundred forty-nine million, four hundred eighty-one thousand, eight hundred fifty-nine".