25434122505 has 16 divisors (see below), whose sum is σ = 44394105024. Its totient is φ = 12331695680.

The previous prime is 25434122489. The next prime is 25434122509. The reversal of 25434122505 is 50522143452.

It is a happy number.

It is not a de Polignac number, because 25434122505 - 2⁴ = 25434122489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (25434122509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77072934 + ... + 77073263.

It is an arithmetic number, because the mean of its divisors is an integer number (2774631564).

Almost surely, 2^25434122505 is an apocalyptic number.

It is an amenable number.

25434122505 is a deficient number, since it is larger than the sum of its proper divisors (18959982519).

25434122505 is a wasteful number, since it uses less digits than its factorization.

25434122505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154146216.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 25434122505 its reverse (50522143452), we get a palindrome (75956265957).

The spelling of 25434122505 in words is "twenty-five billion, four hundred thirty-four million, one hundred twenty-two thousand, five hundred five".