2605430123655 has 32 divisors (see below), whose sum is σ = 4406925968640. Its totient is φ = 1310777913600.

The previous prime is 2605430123591. The next prime is 2605430123663. The reversal of 2605430123655 is 5563210345062.

It is a happy number.

It is not a de Polignac number, because 2605430123655 - 2⁶ = 2605430123591 is a prime.

It is a super-2 number, since 2×2605430123655² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19551321 + ... + 19684130.

It is an arithmetic number, because the mean of its divisors is an integer number (137716436520).

Almost surely, 2^{2605430123655} is an apocalyptic number.

2605430123655 is a deficient number, since it is larger than the sum of its proper divisors (1801495844985).

2605430123655 is a wasteful number, since it uses less digits than its factorization.

2605430123655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39235711.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 2605430123655 in words is "two trillion, six hundred five billion, four hundred thirty million, one hundred twenty-three thousand, six hundred fifty-five".