19215048765 has 64 divisors (see below), whose sum is σ = 33933468672. Its totient is φ = 9207244800.

The previous prime is 19215048761. The next prime is 19215048793. The reversal of 19215048765 is 56784051291.

It is a happy number.

It is not a de Polignac number, because 19215048765 - 2² = 19215048761 is a prime.

It is a super-3 number, since 3×19215048765³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19215048761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9232525 + ... + 9234605.

It is an arithmetic number, because the mean of its divisors is an integer number (530210448).

Almost surely, 2^19215048765 is an apocalyptic number.

19215048765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19215048765 is a deficient number, since it is larger than the sum of its proper divisors (14718419907).

19215048765 is a wasteful number, since it uses less digits than its factorization.

19215048765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730.

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 19215048765 in words is "nineteen billion, two hundred fifteen million, forty-eight thousand, seven hundred sixty-five".