1540231315161 has 16 divisors (see below), whose sum is σ = 2560384524288. Its totient is φ = 800120163600.

The previous prime is 1540231315141. The next prime is 1540231315187. The reversal of 1540231315161 is 1615131320451.

It is a happy number.

It is not a de Polignac number, because 1540231315161 - 2¹⁵ = 1540231282393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1540231315141) 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, 3333833785 + ... + 3333834246.

It is an arithmetic number, because the mean of its divisors is an integer number (160024032768).

Almost surely, 2^{1540231315161} is an apocalyptic number.

1540231315161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1540231315161 is a deficient number, since it is larger than the sum of its proper divisors (1020153209127).

1540231315161 is a wasteful number, since it uses less digits than its factorization.

1540231315161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667668052.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 1540231315161 in words is "one trillion, five hundred forty billion, two hundred thirty-one million, three hundred fifteen thousand, one hundred sixty-one".