25700069387 has 2 divisors, whose sum is σ = 25700069388. Its totient is φ = 25700069386.

The previous prime is 25700069371. The next prime is 25700069471. The reversal of 25700069387 is 78396000752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25700069387 - 2⁴ = 25700069371 is a prime.

It is a super-2 number, since 2×25700069387² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25700069347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12850034693 + 12850034694.

It is an arithmetic number, because the mean of its divisors is an integer number (12850034694).

Almost surely, 2^25700069387 is an apocalyptic number.

25700069387 is a deficient number, since it is larger than the sum of its proper divisors (1).

25700069387 is an equidigital number, since it uses as much as digits as its factorization.

25700069387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 25700069387 in words is "twenty-five billion, seven hundred million, sixty-nine thousand, three hundred eighty-seven".