1642605099255 has 36 divisors (see below), whose sum is σ = 2909049593112. Its totient is φ = 857416510560.

The previous prime is 1642605099251. The next prime is 1642605099367. The reversal of 1642605099255 is 5529905062461.

1642605099255 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 605 + 0 + 9 + 9 + 25 + 5 = 666.

It is not a de Polignac number, because 1642605099255 - 2² = 1642605099251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642605099251) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8162781 + ... + 8361590.

It is an arithmetic number, because the mean of its divisors is an integer number (80806933142).

Almost surely, 2^{1642605099255} is an apocalyptic number.

1642605099255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1642605099255 is a deficient number, since it is larger than the sum of its proper divisors (1266444493857).

1642605099255 is a wasteful number, since it uses less digits than its factorization.

1642605099255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16524476 (or 16524426 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 1642605099255 in words is "one trillion, six hundred forty-two billion, six hundred five million, ninety-nine thousand, two hundred fifty-five".