25851772823513 has 8 divisors (see below), whose sum is σ = 31817566552128. Its totient is φ = 20454149926224.

The previous prime is 25851772823509. The next prime is 25851772823573. The reversal of 25851772823513 is 31532827715852.

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

It is not a de Polignac number, because 25851772823513 - 2² = 25851772823509 is a prime.

It is a super-2 number, since 2×25851772823513² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25851772823573) 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, 142042707731 + ... + 142042707912.

It is an arithmetic number, because the mean of its divisors is an integer number (3977195819016).

Almost surely, 2^{25851772823513} is an apocalyptic number.

It is an amenable number.

25851772823513 is a deficient number, since it is larger than the sum of its proper divisors (5965793728615).

25851772823513 is a wasteful number, since it uses less digits than its factorization.

25851772823513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284085415663.

The product of its digits is 28224000, while the sum is 59.

The spelling of 25851772823513 in words is "twenty-five trillion, eight hundred fifty-one billion, seven hundred seventy-two million, eight hundred twenty-three thousand, five hundred thirteen".