315534551440 has 40 divisors (see below), whose sum is σ = 741180920760. Its totient is φ = 124912644096.

The previous prime is 315534551363. The next prime is 315534551461. The reversal of 315534551440 is 44155435513.

It can be written as a sum of positive squares in 4 ways, for example, as 93998654464 + 221535896976 = 306592^2 + 470676^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 315534551393 and 315534551402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20323075 + ... + 20338594.

It is an arithmetic number, because the mean of its divisors is an integer number (18529523019).

Almost surely, 2^315534551440 is an apocalyptic number.

It is an amenable number.

315534551440 is an abundant number, since it is smaller than the sum of its proper divisors (425646369320).

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

315534551440 is a wasteful number, since it uses less digits than its factorization.

315534551440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40661779 (or 40661773 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 315534551440 its reverse (44155435513), we get a palindrome (359689986953).

The spelling of 315534551440 in words is "three hundred fifteen billion, five hundred thirty-four million, five hundred fifty-one thousand, four hundred forty".