15945193694 has 16 divisors (see below), whose sum is σ = 24509941632. Its totient is φ = 7775757528.

The previous prime is 15945193687. The next prime is 15945193709. The reversal of 15945193694 is 49639154951.

It is a congruent number.

It is an unprimeable number.

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, 76994 + ... + 194469.

It is an arithmetic number, because the mean of its divisors is an integer number (1531871352).

Almost surely, 2^15945193694 is an apocalyptic number.

15945193694 is a deficient number, since it is larger than the sum of its proper divisors (8564747938).

15945193694 is a wasteful number, since it uses less digits than its factorization.

15945193694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272191.

The product of its digits is 5248800, while the sum is 56.

The spelling of 15945193694 in words is "fifteen billion, nine hundred forty-five million, one hundred ninety-three thousand, six hundred ninety-four".