55187050353491 has 16 divisors (see below), whose sum is σ = 63475007266560. Its totient is φ = 47000139058080.

The previous prime is 55187050353433. The next prime is 55187050353497. The reversal of 55187050353491 is 19435305078155.

It is a cyclic number.

It is not a de Polignac number, because 55187050353491 - 2²² = 55187046159187 is a prime.

It is a super-2 number, since 2×55187050353491² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55187050353497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28982180 + ... + 30827598.

It is an arithmetic number, because the mean of its divisors is an integer number (3967187954160).

Almost surely, 2^{55187050353491} is an apocalyptic number.

55187050353491 is a deficient number, since it is larger than the sum of its proper divisors (8287956913069).

55187050353491 is a wasteful number, since it uses less digits than its factorization.

55187050353491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872794.

The product of its (nonzero) digits is 11340000, while the sum is 56.

The spelling of 55187050353491 in words is "fifty-five trillion, one hundred eighty-seven billion, fifty million, three hundred fifty-three thousand, four hundred ninety-one".