1251453706480 has 20 divisors (see below), whose sum is σ = 2909629867752. Its totient is φ = 500581482560.

The previous prime is 1251453706427. The next prime is 1251453706501. The reversal of 1251453706480 is 846073541521.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1251453706480² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1251453706480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7821585586 + ... + 7821585745.

Almost surely, 2^{1251453706480} is an apocalyptic number.

1251453706480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251453706480 is an abundant number, since it is smaller than the sum of its proper divisors (1658176161272).

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

1251453706480 is a wasteful number, since it uses less digits than its factorization.

1251453706480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15643171344 (or 15643171338 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 1251453706480 in words is "one trillion, two hundred fifty-one billion, four hundred fifty-three million, seven hundred six thousand, four hundred eighty".