25860773421 has 16 divisors (see below), whose sum is σ = 43785436800. Its totient is φ = 14777584704.

The previous prime is 25860773417. The next prime is 25860773423. The reversal of 25860773421 is 12437706852.

25860773421 is a `hidden beast` number, since 2 + 5 + 8 + 607 + 7 + 34 + 2 + 1 = 666.

It is not a de Polignac number, because 25860773421 - 2² = 25860773417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25860773423) 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, 68414556 + ... + 68414933.

It is an arithmetic number, because the mean of its divisors is an integer number (2736589800).

Almost surely, 2^25860773421 is an apocalyptic number.

25860773421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25860773421 is a deficient number, since it is larger than the sum of its proper divisors (17924663379).

25860773421 is a wasteful number, since it uses less digits than its factorization.

25860773421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136829505 (or 136829499 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 25860773421 in words is "twenty-five billion, eight hundred sixty million, seven hundred seventy-three thousand, four hundred twenty-one".