87767365057 has 4 divisors (see below), whose sum is σ = 92386700080. Its totient is φ = 83148030036.

The previous prime is 87767365033. The next prime is 87767365067. The reversal of 87767365057 is 75056376778.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75056376778 = 2 ⋅37528188389.

It is a cyclic number.

It is not a de Polignac number, because 87767365057 - 2¹¹ = 87767363009 is a prime.

It is a super-2 number, since 2×87767365057² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87767364986 and 87767365004.

It is not an unprimeable number, because it can be changed into a prime (87767365067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2309667483 + ... + 2309667520.

It is an arithmetic number, because the mean of its divisors is an integer number (23096675020).

Almost surely, 2^87767365057 is an apocalyptic number.

It is an amenable number.

87767365057 is a deficient number, since it is larger than the sum of its proper divisors (4619335023).

87767365057 is a wasteful number, since it uses less digits than its factorization.

87767365057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4619335022.

The product of its (nonzero) digits is 51861600, while the sum is 61.

The spelling of 87767365057 in words is "eighty-seven billion, seven hundred sixty-seven million, three hundred sixty-five thousand, fifty-seven".