15140452440 has 32 divisors (see below), whose sum is σ = 45421357680. Its totient is φ = 4037453952.

The previous prime is 15140452403. The next prime is 15140452441. The reversal of 15140452440 is 4425404151.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 15140452398 and 15140452407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15140452441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63085099 + ... + 63085338.

Almost surely, 2^15140452440 is an apocalyptic number.

15140452440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15140452440 is an abundant number, since it is smaller than the sum of its proper divisors (30280905240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15140452440 is a wasteful number, since it uses less digits than its factorization.

15140452440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126170451 (or 126170447 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 15140452440 its reverse (4425404151), we get a palindrome (19565856591).

The spelling of 15140452440 in words is "fifteen billion, one hundred forty million, four hundred fifty-two thousand, four hundred forty".