87260311057 has 4 divisors (see below), whose sum is σ = 88739299440. Its totient is φ = 85781322676.

The previous prime is 87260311051. The next prime is 87260311063. The reversal of 87260311057 is 75011306278.

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.

It is an interprime number because it is at equal distance from previous prime (87260311051) and next prime (87260311063).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87260311057 is a prime.

It is a super-2 number, since 2×87260311057² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87260311051) 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, 739494103 + ... + 739494220.

It is an arithmetic number, because the mean of its divisors is an integer number (22184824860).

Almost surely, 2^87260311057 is an apocalyptic number.

It is an amenable number.

87260311057 is a deficient number, since it is larger than the sum of its proper divisors (1478988383).

87260311057 is a wasteful number, since it uses less digits than its factorization.

87260311057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478988382.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 87260311057 in words is "eighty-seven billion, two hundred sixty million, three hundred eleven thousand, fifty-seven".