25155165545 has 16 divisors (see below), whose sum is σ = 31060294992. Its totient is φ = 19548921600.

The previous prime is 25155165521. The next prime is 25155165569. The reversal of 25155165545 is 54556155152.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25155165521) and next prime (25155165569).

It can be written as a sum of positive squares in 8 ways, for example, as 235070224 + 24920095321 = 15332^2 + 157861^2 .

It is not a de Polignac number, because 25155165545 - 2²⁰ = 25154116969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25155165496 and 25155165505.

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, 443162 + ... + 496691.

It is an arithmetic number, because the mean of its divisors is an integer number (1941268437).

Almost surely, 2^25155165545 is an apocalyptic number.

It is an amenable number.

25155165545 is a deficient number, since it is larger than the sum of its proper divisors (5905129447).

25155165545 is a wasteful number, since it uses less digits than its factorization.

25155165545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940012.

The product of its digits is 750000, while the sum is 44.

The spelling of 25155165545 in words is "twenty-five billion, one hundred fifty-five million, one hundred sixty-five thousand, five hundred forty-five".