25401161443 has 16 divisors (see below), whose sum is σ = 29809059840. Its totient is φ = 21190593600.

The previous prime is 25401161419. The next prime is 25401161447. The reversal of 25401161443 is 34416110452.

It is a cyclic number.

It is not a de Polignac number, because 25401161443 - 2²¹ = 25399064291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25401161447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14638 + ... + 225868.

It is an arithmetic number, because the mean of its divisors is an integer number (1863066240).

Almost surely, 2^25401161443 is an apocalyptic number.

25401161443 is a deficient number, since it is larger than the sum of its proper divisors (4407898397).

25401161443 is a wasteful number, since it uses less digits than its factorization.

25401161443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211698.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 25401161443 its reverse (34416110452), we get a palindrome (59817271895).

The spelling of 25401161443 in words is "twenty-five billion, four hundred one million, one hundred sixty-one thousand, four hundred forty-three".