155532545235551 has 48 divisors (see below), whose sum is σ = 178855549437600. Its totient is φ = 134975074080000.

The previous prime is 155532545235541. The next prime is 155532545235553.

155532545235551 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-155532545235551 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 (155532545235553) 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, 250966496 + ... + 251585466.

It is an arithmetic number, because the mean of its divisors is an integer number (3726157279950).

Almost surely, 2^{155532545235551} is an apocalyptic number.

155532545235551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155532545235551 is a deficient number, since it is larger than the sum of its proper divisors (23323004202049).

155532545235551 is a wasteful number, since it uses less digits than its factorization.

155532545235551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619832 (or 619821 counting only the distinct ones).

The product of its digits is 56250000, while the sum is 56.

The spelling of 155532545235551 in words is "one hundred fifty-five trillion, five hundred thirty-two billion, five hundred forty-five million, two hundred thirty-five thousand, five hundred fifty-one".