15145946440 has 32 divisors (see below), whose sum is σ = 34163399160. Its totient is φ = 6043264000.

The previous prime is 15145946423. The next prime is 15145946443. The reversal of 15145946440 is 4464954151.

It can be written as a sum of positive squares in 4 ways, for example, as 14743302084 + 402644356 = 121422^2 + 20066^2 .

It is not an unprimeable number, because it can be changed into a prime (15145946443) 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, 456091 + ... + 488170.

Almost surely, 2^15145946440 is an apocalyptic number.

15145946440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15145946440 is an abundant number, since it is smaller than the sum of its proper divisors (19017452720).

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

15145946440 is a wasteful number, since it uses less digits than its factorization.

15145946440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944673 (or 944669 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 15145946440 in words is "fifteen billion, one hundred forty-five million, nine hundred forty-six thousand, four hundred forty".