1315747421538 has 32 divisors (see below), whose sum is σ = 2871413485632. Its totient is φ = 398615251200.

The previous prime is 1315747421537. The next prime is 1315747421561. The reversal of 1315747421538 is 8351247475131.

It is not an unprimeable number, because it can be changed into a prime (1315747421537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2126043 + ... + 2674238.

It is an arithmetic number, because the mean of its divisors is an integer number (89731671426).

Almost surely, 2^{1315747421538} is an apocalyptic number.

1315747421538 is an abundant number, since it is smaller than the sum of its proper divisors (1555666064094).

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

1315747421538 is a wasteful number, since it uses less digits than its factorization.

1315747421538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4804450.

The product of its digits is 2822400, while the sum is 51.

The spelling of 1315747421538 in words is "one trillion, three hundred fifteen billion, seven hundred forty-seven million, four hundred twenty-one thousand, five hundred thirty-eight".