87879765277 has 8 divisors (see below), whose sum is σ = 89095663800. Its totient is φ = 86668944384.

The previous prime is 87879765241. The next prime is 87879765301. The reversal of 87879765277 is 77256797878.

It can be written as a sum of positive squares in 4 ways, for example, as 15120637156 + 72759128121 = 122966^2 + 269739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87879765277 - 2¹⁵ = 87879732509 is a prime.

It is a super-2 number, since 2×87879765277² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87879765577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1234548 + ... + 1303789.

It is an arithmetic number, because the mean of its divisors is an integer number (11136957975).

Almost surely, 2^87879765277 is an apocalyptic number.

It is an amenable number.

87879765277 is a deficient number, since it is larger than the sum of its proper divisors (1215898523).

87879765277 is a wasteful number, since it uses less digits than its factorization.

87879765277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538815.

The product of its digits is 580849920, while the sum is 73.

The spelling of 87879765277 in words is "eighty-seven billion, eight hundred seventy-nine million, seven hundred sixty-five thousand, two hundred seventy-seven".