25515263606155 has 16 divisors (see below), whose sum is σ = 30922530073344. Its totient is φ = 20209490805600.

The previous prime is 25515263606113. The next prime is 25515263606177. The reversal of 25515263606155 is 55160636251552.

It is not a de Polignac number, because 25515263606155 - 2¹⁷ = 25515263475083 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3273249 + ... + 7857778.

It is an arithmetic number, because the mean of its divisors is an integer number (1932658129584).

Almost surely, 2^{25515263606155} is an apocalyptic number.

25515263606155 is a deficient number, since it is larger than the sum of its proper divisors (5407266467189).

25515263606155 is a wasteful number, since it uses less digits than its factorization.

25515263606155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11135586.

The product of its (nonzero) digits is 8100000, while the sum is 52.

The spelling of 25515263606155 in words is "twenty-five trillion, five hundred fifteen billion, two hundred sixty-three million, six hundred six thousand, one hundred fifty-five".