155431464134551 has 48 divisors (see below), whose sum is σ = 174810875137920. Its totient is φ = 138055019572800.

The previous prime is 155431464134491. The next prime is 155431464134587.

155431464134551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 155431464134551 - 2¹⁵ = 155431464101783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155431464134251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1198262640 + ... + 1198392346.

It is an arithmetic number, because the mean of its divisors is an integer number (3641893232040).

Almost surely, 2^{155431464134551} is an apocalyptic number.

155431464134551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155431464134551 is a deficient number, since it is larger than the sum of its proper divisors (19379411003369).

155431464134551 is a wasteful number, since it uses less digits than its factorization.

155431464134551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130876 (or 130865 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 52.

The spelling of 155431464134551 in words is "one hundred fifty-five trillion, four hundred thirty-one billion, four hundred sixty-four million, one hundred thirty-four thousand, five hundred fifty-one".