55099873785 has 32 divisors (see below), whose sum is σ = 96587157888. Its totient is φ = 26600414720.

The previous prime is 55099873781. The next prime is 55099873789. The reversal of 55099873785 is 58737899055.

It is an interprime number because it is at equal distance from previous prime (55099873781) and next prime (55099873789).

It is not a de Polignac number, because 55099873785 - 2² = 55099873781 is a prime.

It is a super-2 number, since 2×55099873785² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55099873781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 678162 + ... + 755051.

It is an arithmetic number, because the mean of its divisors is an integer number (3018348684).

Almost surely, 2^55099873785 is an apocalyptic number.

55099873785 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55099873785 is a deficient number, since it is larger than the sum of its proper divisors (41487284103).

55099873785 is a wasteful number, since it uses less digits than its factorization.

55099873785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433465.

The product of its (nonzero) digits is 95256000, while the sum is 66.

The spelling of 55099873785 in words is "fifty-five billion, ninety-nine million, eight hundred seventy-three thousand, seven hundred eighty-five".