154571312631551 has 4 divisors (see below), whose sum is σ = 154575407599032. Its totient is φ = 154567217664072.

The previous prime is 154571312631511. The next prime is 154571312631577. The reversal of 154571312631551 is 155136213175451.

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-154571312631551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154571312631551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154571312631511) 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, 2047427120 + ... + 2047502613.

It is an arithmetic number, because the mean of its divisors is an integer number (38643851899758).

Almost surely, 2^{154571312631551} is an apocalyptic number.

154571312631551 is a deficient number, since it is larger than the sum of its proper divisors (4094967481).

154571312631551 is an equidigital number, since it uses as much as digits as its factorization.

154571312631551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094967480.

The product of its digits is 1890000, while the sum is 50.

The spelling of 154571312631551 in words is "one hundred fifty-four trillion, five hundred seventy-one billion, three hundred twelve million, six hundred thirty-one thousand, five hundred fifty-one".