25130621401 has 2 divisors, whose sum is σ = 25130621402. Its totient is φ = 25130621400.

The previous prime is 25130621357. The next prime is 25130621423. The reversal of 25130621401 is 10412603152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20989055376 + 4141566025 = 144876^2 + 64355^2 .

It is a cyclic number.

It is not a de Polignac number, because 25130621401 - 2³¹ = 22983137753 is a prime.

It is not a weakly prime, because it can be changed into another prime (25130621471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12565310700 + 12565310701.

It is an arithmetic number, because the mean of its divisors is an integer number (12565310701).

Almost surely, 2^25130621401 is an apocalyptic number.

It is an amenable number.

25130621401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25130621401 is an equidigital number, since it uses as much as digits as its factorization.

25130621401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 25130621401 in words is "twenty-five billion, one hundred thirty million, six hundred twenty-one thousand, four hundred one".