154256426421 has 16 divisors (see below), whose sum is σ = 207552596160. Its totient is φ = 101903195520.

The previous prime is 154256426417. The next prime is 154256426461. The reversal of 154256426421 is 124624652451.

It is not a de Polignac number, because 154256426421 - 2² = 154256426417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154256426461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387120 + ... + 677033.

It is an arithmetic number, because the mean of its divisors is an integer number (12972037260).

Almost surely, 2^154256426421 is an apocalyptic number.

It is an amenable number.

154256426421 is a deficient number, since it is larger than the sum of its proper divisors (53296169739).

154256426421 is a wasteful number, since it uses less digits than its factorization.

154256426421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064596.

The product of its digits is 460800, while the sum is 42.

The spelling of 154256426421 in words is "one hundred fifty-four billion, two hundred fifty-six million, four hundred twenty-six thousand, four hundred twenty-one".