10509823815 has 16 divisors (see below), whose sum is σ = 16900224000. Its totient is φ = 5577070752.

The previous prime is 10509823811. The next prime is 10509823873. The reversal of 10509823815 is 51832890501.

It is not a de Polignac number, because 10509823815 - 2² = 10509823811 is a prime.

It is a super-2 number, since 2×10509823815² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10509823811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1757455 + ... + 1763424.

It is an arithmetic number, because the mean of its divisors is an integer number (1056264000).

Almost surely, 2^10509823815 is an apocalyptic number.

10509823815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10509823815 is a deficient number, since it is larger than the sum of its proper divisors (6390400185).

10509823815 is a wasteful number, since it uses less digits than its factorization.

10509823815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521086.

The product of its (nonzero) digits is 86400, while the sum is 42.

The spelling of 10509823815 in words is "ten billion, five hundred nine million, eight hundred twenty-three thousand, eight hundred fifteen".