1264640115026 has 32 divisors (see below), whose sum is σ = 2027468257920. Its totient is φ = 589860835200.

The previous prime is 1264640114977. The next prime is 1264640115043. The reversal of 1264640115026 is 6205110464621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1856246 + ... + 2444366.

It is an arithmetic number, because the mean of its divisors is an integer number (63358383060).

Almost surely, 2^{1264640115026} is an apocalyptic number.

1264640115026 is a deficient number, since it is larger than the sum of its proper divisors (762828142894).

1264640115026 is a wasteful number, since it uses less digits than its factorization.

1264640115026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589010.

The product of its (nonzero) digits is 69120, while the sum is 38.

Adding to 1264640115026 its reverse (6205110464621), we get a palindrome (7469750579647).

The spelling of 1264640115026 in words is "one trillion, two hundred sixty-four billion, six hundred forty million, one hundred fifteen thousand, twenty-six".