25419256478 has 16 divisors (see below), whose sum is σ = 47537311104. Its totient is φ = 9903606360.

The previous prime is 25419256469. The next prime is 25419256481. The reversal of 25419256478 is 87465291452.

It is a super-2 number, since 2×25419256478² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82529900 + ... + 82530207.

It is an arithmetic number, because the mean of its divisors is an integer number (2971081944).

Almost surely, 2^25419256478 is an apocalyptic number.

25419256478 is a deficient number, since it is larger than the sum of its proper divisors (22118054626).

25419256478 is a wasteful number, since it uses less digits than its factorization.

25419256478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165060127.

The product of its digits is 4838400, while the sum is 53.

The spelling of 25419256478 in words is "twenty-five billion, four hundred nineteen million, two hundred fifty-six thousand, four hundred seventy-eight".