1540405252534 has 8 divisors (see below), whose sum is σ = 2313866848320. Its totient is φ = 769116303096.

The previous prime is 1540405252531. The next prime is 1540405252567. The reversal of 1540405252534 is 4352525040451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540405252531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543159814 + ... + 543162649.

It is an arithmetic number, because the mean of its divisors is an integer number (289233356040).

Almost surely, 2^{1540405252534} is an apocalyptic number.

1540405252534 is a deficient number, since it is larger than the sum of its proper divisors (773461595786).

1540405252534 is a wasteful number, since it uses less digits than its factorization.

1540405252534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086323174.

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 1540405252534 in words is "one trillion, five hundred forty billion, four hundred five million, two hundred fifty-two thousand, five hundred thirty-four".