1264251489340 has 48 divisors (see below), whose sum is σ = 3034274443200. Its totient is φ = 433447529472.

The previous prime is 1264251489331. The next prime is 1264251489341. The reversal of 1264251489340 is 439841524621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264251489341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8286466 + ... + 8437654.

It is an arithmetic number, because the mean of its divisors is an integer number (63214050900).

Almost surely, 2^{1264251489340} is an apocalyptic number.

1264251489340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264251489340 is an abundant number, since it is smaller than the sum of its proper divisors (1770022953860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1264251489340 is a wasteful number, since it uses less digits than its factorization.

1264251489340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210934 (or 210932 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 1264251489340 in words is "one trillion, two hundred sixty-four billion, two hundred fifty-one million, four hundred eighty-nine thousand, three hundred forty".