815478016190 has 64 divisors (see below), whose sum is σ = 1560712950720. Its totient is φ = 305720739840.

The previous prime is 815478016159. The next prime is 815478016211. The reversal of 815478016190 is 91610874518.

It is a happy number.

It is a super-2 number, since 2×815478016190² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39880109 + ... + 39900551.

It is an arithmetic number, because the mean of its divisors is an integer number (24386139855).

Almost surely, 2^815478016190 is an apocalyptic number.

815478016190 is a deficient number, since it is larger than the sum of its proper divisors (745234934530).

815478016190 is a wasteful number, since it uses less digits than its factorization.

815478016190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21437.

The product of its (nonzero) digits is 483840, while the sum is 50.

The spelling of 815478016190 in words is "eight hundred fifteen billion, four hundred seventy-eight million, sixteen thousand, one hundred ninety".