155001056551 has 32 divisors (see below), whose sum is σ = 176102625600. Its totient is φ = 135136512000.

The previous prime is 155001056549. The next prime is 155001056557. The reversal of 155001056551 is 155650100551.

It is a cyclic number.

It is not a de Polignac number, because 155001056551 - 2¹ = 155001056549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155001056557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32363665 + ... + 32368453.

It is an arithmetic number, because the mean of its divisors is an integer number (5503207050).

Almost surely, 2^155001056551 is an apocalyptic number.

155001056551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155001056551 is a deficient number, since it is larger than the sum of its proper divisors (21101569049).

155001056551 is a wasteful number, since it uses less digits than its factorization.

155001056551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491.

The product of its (nonzero) digits is 18750, while the sum is 34.

The spelling of 155001056551 in words is "one hundred fifty-five billion, one million, fifty-six thousand, five hundred fifty-one".