1264164157867 has 4 divisors (see below), whose sum is σ = 1361407554640. Its totient is φ = 1166920761096.

The previous prime is 1264164157859. The next prime is 1264164157889. The reversal of 1264164157867 is 7687514614621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1264164157867 - 2³ = 1264164157859 is a prime.

It is a super-2 number, since 2×1264164157867² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264164151867) 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, 48621698367 + ... + 48621698392.

It is an arithmetic number, because the mean of its divisors is an integer number (340351888660).

Almost surely, 2^{1264164157867} is an apocalyptic number.

1264164157867 is a deficient number, since it is larger than the sum of its proper divisors (97243396773).

1264164157867 is an equidigital number, since it uses as much as digits as its factorization.

1264164157867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97243396772.

The product of its digits is 13547520, while the sum is 58.

The spelling of 1264164157867 in words is "one trillion, two hundred sixty-four billion, one hundred sixty-four million, one hundred fifty-seven thousand, eight hundred sixty-seven".