15540006742 has 16 divisors (see below), whose sum is σ = 25106713632. Its totient is φ = 7171274880.

The previous prime is 15540006739. The next prime is 15540006743. The reversal of 15540006742 is 24760004551.

It is a junction number, because it is equal to n+sod(n) for n = 15540006698 and 15540006707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15540006743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157998 + ... + 236734.

It is an arithmetic number, because the mean of its divisors is an integer number (1569169602).

Almost surely, 2^15540006742 is an apocalyptic number.

15540006742 is a deficient number, since it is larger than the sum of its proper divisors (9566706890).

15540006742 is a wasteful number, since it uses less digits than its factorization.

15540006742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86343.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 15540006742 in words is "fifteen billion, five hundred forty million, six thousand, seven hundred forty-two".