254191651845 has 16 divisors (see below), whose sum is σ = 410655253632. Its totient is φ = 134252677440.

The previous prime is 254191651837. The next prime is 254191651849. The reversal of 254191651845 is 548156191452.

It is not a de Polignac number, because 254191651845 - 2³ = 254191651837 is a prime.

It is a super-2 number, since 2×254191651845² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254191651849) 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, 82261126 + ... + 82264215.

It is an arithmetic number, because the mean of its divisors is an integer number (25665953352).

Almost surely, 2^254191651845 is an apocalyptic number.

It is an amenable number.

254191651845 is a deficient number, since it is larger than the sum of its proper divisors (156463601787).

254191651845 is a wasteful number, since it uses less digits than its factorization.

254191651845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164525452.

The product of its digits is 1728000, while the sum is 51.

The spelling of 254191651845 in words is "two hundred fifty-four billion, one hundred ninety-one million, six hundred fifty-one thousand, eight hundred forty-five".