25131780453 has 32 divisors (see below), whose sum is σ = 38134051200. Its totient is φ = 14594605056.

The previous prime is 25131780431. The next prime is 25131780521. The reversal of 25131780453 is 35408713152.

It is a happy number.

It is not a de Polignac number, because 25131780453 - 2⁹ = 25131779941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25131780413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124453 + ... + 256421.

It is an arithmetic number, because the mean of its divisors is an integer number (1191689100).

Almost surely, 2^25131780453 is an apocalyptic number.

It is an amenable number.

25131780453 is a deficient number, since it is larger than the sum of its proper divisors (13002270747).

25131780453 is a wasteful number, since it uses less digits than its factorization.

25131780453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132261.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 25131780453 in words is "twenty-five billion, one hundred thirty-one million, seven hundred eighty thousand, four hundred fifty-three".