25428881547 has 6 divisors (see below), whose sum is σ = 36730606692. Its totient is φ = 16952587692.

The previous prime is 25428881521. The next prime is 25428881573. The reversal of 25428881547 is 74518882452.

25428881547 is a `hidden beast` number, since 2 + 542 + 8 + 88 + 15 + 4 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (25428881521) and next prime (25428881573).

It is not a de Polignac number, because 25428881547 - 2¹¹ = 25428879499 is a prime.

It is a super-2 number, since 2×25428881547² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25428881493 and 25428881502.

It is not an unprimeable number, because it can be changed into a prime (25428881047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1412715633 + ... + 1412715650.

It is an arithmetic number, because the mean of its divisors is an integer number (6121767782).

Almost surely, 2^25428881547 is an apocalyptic number.

25428881547 is a deficient number, since it is larger than the sum of its proper divisors (11301725145).

25428881547 is a wasteful number, since it uses less digits than its factorization.

25428881547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825431289 (or 2825431286 counting only the distinct ones).

The product of its digits is 5734400, while the sum is 54.

The spelling of 25428881547 in words is "twenty-five billion, four hundred twenty-eight million, eight hundred eighty-one thousand, five hundred forty-seven".