15945193693 has 16 divisors (see below), whose sum is σ = 19547289216. Its totient is φ = 12798815040.

The previous prime is 15945193687. The next prime is 15945193709. The reversal of 15945193693 is 39639154951.

It is a happy number.

It is not a de Polignac number, because 15945193693 - 2¹⁷ = 15945062621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15945193613) 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 15 ways as a sum of consecutive naturals, for example, 2420730 + ... + 2427307.

It is an arithmetic number, because the mean of its divisors is an integer number (1221705576).

Almost surely, 2^15945193693 is an apocalyptic number.

15945193693 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

15945193693 is a deficient number, since it is larger than the sum of its proper divisors (3602095523).

15945193693 is a wasteful number, since it uses less digits than its factorization.

15945193693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4848084.

The product of its digits is 3936600, while the sum is 55.

The spelling of 15945193693 in words is "fifteen billion, nine hundred forty-five million, one hundred ninety-three thousand, six hundred ninety-three".