25216987475779 has 8 divisors (see below), whose sum is σ = 28180402855920. Its totient is φ = 22365399091200.

The previous prime is 25216987475761. The next prime is 25216987475857. The reversal of 25216987475779 is 97757478961252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25216987475779 - 2¹⁷ = 25216987344707 is a prime.

It is a super-2 number, since 2×25216987475779² (a number of 28 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 = 25216987475699 and 25216987475708.

It is not an unprimeable number, because it can be changed into a prime (25216987475579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27956748414 + ... + 27956749315.

It is an arithmetic number, because the mean of its divisors is an integer number (3522550356990).

Almost surely, 2^{25216987475779} is an apocalyptic number.

25216987475779 is a deficient number, since it is larger than the sum of its proper divisors (2963415380141).

25216987475779 is a wasteful number, since it uses less digits than its factorization.

25216987475779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55913497781.

The product of its digits is 3734035200, while the sum is 79.

The spelling of 25216987475779 in words is "twenty-five trillion, two hundred sixteen billion, nine hundred eighty-seven million, four hundred seventy-five thousand, seven hundred seventy-nine".