13525642450 has 12 divisors (see below), whose sum is σ = 25157695050. Its totient is φ = 5410256960.

The previous prime is 13525642439. The next prime is 13525642477. The reversal of 13525642450 is 5424652531.

It can be written as a sum of positive squares in 3 ways, for example, as 9310127121 + 4215515329 = 96489^2 + 64927^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135256375 + ... + 135256474.

Almost surely, 2^13525642450 is an apocalyptic number.

13525642450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13525642450 is a deficient number, since it is larger than the sum of its proper divisors (11632052600).

13525642450 is a wasteful number, since it uses less digits than its factorization.

13525642450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270512861 (or 270512856 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 13525642450 in words is "thirteen billion, five hundred twenty-five million, six hundred forty-two thousand, four hundred fifty".