15940870845 has 32 divisors (see below), whose sum is σ = 27018593280. Its totient is φ = 7997875200.

The previous prime is 15940870837. The next prime is 15940870859. The reversal of 15940870845 is 54807804951.

It is not a de Polignac number, because 15940870845 - 2³ = 15940870837 is a prime.

It is a super-2 number, since 2×15940870845² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

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 31 ways as a sum of consecutive naturals, for example, 564820 + ... + 592370.

It is an arithmetic number, because the mean of its divisors is an integer number (844331040).

Almost surely, 2^15940870845 is an apocalyptic number.

15940870845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15940870845 is a deficient number, since it is larger than the sum of its proper divisors (11077722435).

15940870845 is a wasteful number, since it uses less digits than its factorization.

15940870845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29845.

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 15940870845 in words is "fifteen billion, nine hundred forty million, eight hundred seventy thousand, eight hundred forty-five".