25705422534 has 32 divisors (see below), whose sum is σ = 56639865600. Its totient is φ = 7712396000.

The previous prime is 25705422503. The next prime is 25705422559. The reversal of 25705422534 is 43522450752.

It is a junction number, because it is equal to n+sod(n) for n = 25705422492 and 25705422501.

It is a congruent 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, 1921434 + ... + 1934765.

It is an arithmetic number, because the mean of its divisors is an integer number (1769995800).

Almost surely, 2^25705422534 is an apocalyptic number.

25705422534 is an abundant number, since it is smaller than the sum of its proper divisors (30934443066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25705422534 is a wasteful number, since it uses less digits than its factorization.

25705422534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856316.

The product of its (nonzero) digits is 336000, while the sum is 39.

The spelling of 25705422534 in words is "twenty-five billion, seven hundred five million, four hundred twenty-two thousand, five hundred thirty-four".