25715156214461 has 4 divisors (see below), whose sum is σ = 29388749959392. Its totient is φ = 22041562469532.

The previous prime is 25715156214409. The next prime is 25715156214467. The reversal of 25715156214461 is 16441265151752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25715156214461 - 2³⁴ = 25697976345277 is a prime.

It is a super-2 number, since 2×25715156214461² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25715156214467) 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, 1836796872455 + ... + 1836796872468.

It is an arithmetic number, because the mean of its divisors is an integer number (7347187489848).

Almost surely, 2^{25715156214461} is an apocalyptic number.

It is an amenable number.

25715156214461 is a deficient number, since it is larger than the sum of its proper divisors (3673593744931).

25715156214461 is an equidigital number, since it uses as much as digits as its factorization.

25715156214461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673593744930.

The product of its digits is 2016000, while the sum is 50.

The spelling of 25715156214461 in words is "twenty-five trillion, seven hundred fifteen billion, one hundred fifty-six million, two hundred fourteen thousand, four hundred sixty-one".