258099655 has 12 divisors (see below), whose sum is σ = 340436376. Its totient is φ = 187708400.

The previous prime is 258099649. The next prime is 258099713. The reversal of 258099655 is 556990852.

It is not a de Polignac number, because 258099655 - 2⁹ = 258099143 is a prime.

It is a super-2 number, since 2×258099655² = 133230863822238050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 258099599 and 258099608.

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, 212701 + ... + 213910.

It is an arithmetic number, because the mean of its divisors is an integer number (28369698).

Almost surely, 2^258099655 is an apocalyptic number.

258099655 is a deficient number, since it is larger than the sum of its proper divisors (82336721).

258099655 is a wasteful number, since it uses less digits than its factorization.

258099655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426638 (or 426627 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 49.

The square root of 258099655 is about 16065.4802293613. The cubic root of 258099655 is about 636.6916310426.

The spelling of 258099655 in words is "two hundred fifty-eight million, ninety-nine thousand, six hundred fifty-five".