87763819515 has 16 divisors (see below), whose sum is σ = 141432345600. Its totient is φ = 46470625632.

The previous prime is 87763819511. The next prime is 87763819547. The reversal of 87763819515 is 51591836778.

It is a happy number.

It is not a de Polignac number, because 87763819515 - 2² = 87763819511 is a prime.

It is a super-2 number, since 2×87763819515² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87763819511) 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, 21044395 + ... + 21048564.

It is an arithmetic number, because the mean of its divisors is an integer number (8839521600).

Almost surely, 2^87763819515 is an apocalyptic number.

87763819515 is a deficient number, since it is larger than the sum of its proper divisors (53668526085).

87763819515 is a wasteful number, since it uses less digits than its factorization.

87763819515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42093106.

The product of its digits is 12700800, while the sum is 60.

The spelling of 87763819515 in words is "eighty-seven billion, seven hundred sixty-three million, eight hundred nineteen thousand, five hundred fifteen".