87722667573 has 4 divisors (see below), whose sum is σ = 116963556768. Its totient is φ = 58481778380.

The previous prime is 87722667551. The next prime is 87722667577. The reversal of 87722667573 is 37576622778.

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 a cyclic number.

It is not a de Polignac number, because 87722667573 - 2²⁰ = 87721618997 is a prime.

It is a super-2 number, since 2×87722667573² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87722667577) 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, 14620444593 + ... + 14620444598.

It is an arithmetic number, because the mean of its divisors is an integer number (29240889192).

Almost surely, 2^87722667573 is an apocalyptic number.

It is an amenable number.

87722667573 is a deficient number, since it is larger than the sum of its proper divisors (29240889195).

87722667573 is a wasteful number, since it uses less digits than its factorization.

87722667573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29240889194.

The product of its digits is 41489280, while the sum is 60.

The spelling of 87722667573 in words is "eighty-seven billion, seven hundred twenty-two million, six hundred sixty-seven thousand, five hundred seventy-three".