1264000423451 has 4 divisors (see below), whose sum is σ = 1264084632192. Its totient is φ = 1263916214712.

The previous prime is 1264000423409. The next prime is 1264000423453. The reversal of 1264000423451 is 1543240004621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264000423451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264000423453) 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, 42081851 + ... + 42111876.

It is an arithmetic number, because the mean of its divisors is an integer number (316021158048).

Almost surely, 2^{1264000423451} is an apocalyptic number.

1264000423451 is a deficient number, since it is larger than the sum of its proper divisors (84208741).

1264000423451 is an equidigital number, since it uses as much as digits as its factorization.

1264000423451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84208740.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 1264000423451 in words is "one trillion, two hundred sixty-four billion, four hundred twenty-three thousand, four hundred fifty-one".