154745123881 has 4 divisors (see below), whose sum is σ = 154746432000. Its totient is φ = 154743815764.

The previous prime is 154745123879. The next prime is 154745123893. The reversal of 154745123881 is 188321547451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 154745123881 - 2¹ = 154745123879 is a prime.

It is a super-2 number, since 2×154745123881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154745123851) 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, 456781 + ... + 719818.

It is an arithmetic number, because the mean of its divisors is an integer number (38686608000).

Almost surely, 2^154745123881 is an apocalyptic number.

It is an amenable number.

154745123881 is a deficient number, since it is larger than the sum of its proper divisors (1308119).

154745123881 is a wasteful number, since it uses less digits than its factorization.

154745123881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308118.

The product of its digits is 1075200, while the sum is 49.

The spelling of 154745123881 in words is "one hundred fifty-four billion, seven hundred forty-five million, one hundred twenty-three thousand, eight hundred eighty-one".