25932778463 has 4 divisors (see below), whose sum is σ = 27297661560. Its totient is φ = 24567895368.

The previous prime is 25932778451. The next prime is 25932778499. The reversal of 25932778463 is 36487723952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25932778463 - 2²² = 25928584159 is a prime.

It is a super-2 number, since 2×25932778463² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25932778399 and 25932778408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25932778423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682441520 + ... + 682441557.

It is an arithmetic number, because the mean of its divisors is an integer number (6824415390).

Almost surely, 2^25932778463 is an apocalyptic number.

25932778463 is a deficient number, since it is larger than the sum of its proper divisors (1364883097).

25932778463 is a wasteful number, since it uses less digits than its factorization.

25932778463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364883096.

The product of its digits is 15240960, while the sum is 56.

The spelling of 25932778463 in words is "twenty-five billion, nine hundred thirty-two million, seven hundred seventy-eight thousand, four hundred sixty-three".