86772817157 has 8 divisors (see below), whose sum is σ = 93460677240. Its totient is φ = 80086818240.

The previous prime is 86772817129. The next prime is 86772817193. The reversal of 86772817157 is 75171827768.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48054777796 + 38718039361 = 219214^2 + 196769^2 .

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

It is not a de Polignac number, because 86772817157 - 2¹⁰ = 86772816133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86772817096 and 86772817105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86772817057) 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, 367694 + ... + 555647.

It is an arithmetic number, because the mean of its divisors is an integer number (11682584655).

Almost surely, 2^86772817157 is an apocalyptic number.

It is an amenable number.

86772817157 is a deficient number, since it is larger than the sum of its proper divisors (6687860083).

86772817157 is a wasteful number, since it uses less digits than its factorization.

86772817157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930583.

The product of its digits is 9219840, while the sum is 59.

The spelling of 86772817157 in words is "eighty-six billion, seven hundred seventy-two million, eight hundred seventeen thousand, one hundred fifty-seven".