55191513650 has 48 divisors (see below), whose sum is σ = 126346121664. Its totient is φ = 17467202880.

The previous prime is 55191513649. The next prime is 55191513653. The reversal of 55191513650 is 5631519155.

It is a super-2 number, since 2×55191513650² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55191513598 and 55191513607.

It is not an unprimeable number, because it can be changed into a prime (55191513653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6060452 + ... + 6069551.

It is an arithmetic number, because the mean of its divisors is an integer number (2632210868).

Almost surely, 2^55191513650 is an apocalyptic number.

55191513650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55191513650 is an abundant number, since it is smaller than the sum of its proper divisors (71154608014).

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

55191513650 is a wasteful number, since it uses less digits than its factorization.

55191513650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12130035 (or 12130030 counting only the distinct ones).

The product of its (nonzero) digits is 101250, while the sum is 41.

It can be divided in two parts, 551915 and 13650, that added together give a palindrome (565565).

The spelling of 55191513650 in words is "fifty-five billion, one hundred ninety-one million, five hundred thirteen thousand, six hundred fifty".