15540434475 has 12 divisors (see below), whose sum is σ = 25693518456. Its totient is φ = 8288231680.

The previous prime is 15540434453. The next prime is 15540434527. The reversal of 15540434475 is 57443404551.

15540434475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15540434475 - 2¹³ = 15540426283 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103602822 + ... + 103602971.

It is an arithmetic number, because the mean of its divisors is an integer number (2141126538).

Almost surely, 2^15540434475 is an apocalyptic number.

15540434475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15540434475 is a deficient number, since it is larger than the sum of its proper divisors (10153083981).

15540434475 is a wasteful number, since it uses less digits than its factorization.

15540434475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207205806 (or 207205801 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 42.

The spelling of 15540434475 in words is "fifteen billion, five hundred forty million, four hundred thirty-four thousand, four hundred seventy-five".