13155737550 has 24 divisors (see below), whose sum is σ = 32626229496. Its totient is φ = 3508196640.

The previous prime is 13155737533. The next prime is 13155737587. The reversal of 13155737550 is 5573755131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43852309 + ... + 43852608.

It is an arithmetic number, because the mean of its divisors is an integer number (1359426229).

Almost surely, 2^13155737550 is an apocalyptic number.

13155737550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13155737550 is an abundant number, since it is smaller than the sum of its proper divisors (19470491946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13155737550 is a wasteful number, since it uses less digits than its factorization.

13155737550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87704932 (or 87704927 counting only the distinct ones).

The product of its (nonzero) digits is 275625, while the sum is 42.

The spelling of 13155737550 in words is "thirteen billion, one hundred fifty-five million, seven hundred thirty-seven thousand, five hundred fifty".