11815728370 has 32 divisors (see below), whose sum is σ = 21856790448. Its totient is φ = 4595678208.

The previous prime is 11815728329. The next prime is 11815728413. The reversal of 11815728370 is 7382751811.

It can be written as a sum of positive squares in 8 ways, for example, as 2616424801 + 9199303569 = 51151^2 + 95913^2 .

It is a super-2 number, since 2×11815728370² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639502 + ... + 657718.

Almost surely, 2^11815728370 is an apocalyptic number.

11815728370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11815728370 is a deficient number, since it is larger than the sum of its proper divisors (10041062078).

11815728370 is a wasteful number, since it uses less digits than its factorization.

11815728370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20014.

The product of its (nonzero) digits is 94080, while the sum is 43.

The spelling of 11815728370 in words is "eleven billion, eight hundred fifteen million, seven hundred twenty-eight thousand, three hundred seventy".