87767276779 has 32 divisors (see below), whose sum is σ = 114649274880. Its totient is φ = 65200937472.

The previous prime is 87767276771. The next prime is 87767276789. The reversal of 87767276779 is 97767276778.

It is a cyclic number.

It is not a de Polignac number, because 87767276779 - 2³ = 87767276771 is a prime.

It is a super-2 number, since 2×87767276779² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87767276771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580492 + ... + 715894.

It is an arithmetic number, because the mean of its divisors is an integer number (3582789840).

Almost surely, 2^87767276779 is an apocalyptic number.

87767276779 is a deficient number, since it is larger than the sum of its proper divisors (26881998101).

87767276779 is a wasteful number, since it uses less digits than its factorization.

87767276779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135859.

The product of its digits is 609892416, while the sum is 73.

Subtracting 87767276779 from its reverse (97767276778), we obtain a palindrome (9999999999).

The spelling of 87767276779 in words is "eighty-seven billion, seven hundred sixty-seven million, two hundred seventy-six thousand, seven hundred seventy-nine".