25078618801 has 2 divisors, whose sum is σ = 25078618802. Its totient is φ = 25078618800.

The previous prime is 25078618783. The next prime is 25078618847. The reversal of 25078618801 is 10881687052.

It is an a-pointer prime, because the next prime (25078618847) can be obtained adding 25078618801 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24625141776 + 453477025 = 156924^2 + 21295^2 .

It is a cyclic number.

It is not a de Polignac number, because 25078618801 - 2¹¹ = 25078616753 is a prime.

It is not a weakly prime, because it can be changed into another prime (25078618001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12539309400 + 12539309401.

It is an arithmetic number, because the mean of its divisors is an integer number (12539309401).

Almost surely, 2^25078618801 is an apocalyptic number.

It is an amenable number.

25078618801 is a deficient number, since it is larger than the sum of its proper divisors (1).

25078618801 is an equidigital number, since it uses as much as digits as its factorization.

25078618801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 46.

The spelling of 25078618801 in words is "twenty-five billion, seventy-eight million, six hundred eighteen thousand, eight hundred one".