1251675326640 has 160 divisors (see below), whose sum is σ = 4143477657600. Its totient is φ = 311874554880.

The previous prime is 1251675326581. The next prime is 1251675326761. The reversal of 1251675326640 is 466235761521.

It is a super-2 number, since 2×1251675326640² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1251675326640.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2684860 + ... + 3116379.

It is an arithmetic number, because the mean of its divisors is an integer number (25896735360).

Almost surely, 2^{1251675326640} is an apocalyptic number.

1251675326640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251675326640 is an abundant number, since it is smaller than the sum of its proper divisors (2891802330960).

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

1251675326640 is a wasteful number, since it uses less digits than its factorization.

1251675326640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5801315 (or 5801309 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 1251675326640 in words is "one trillion, two hundred fifty-one billion, six hundred seventy-five million, three hundred twenty-six thousand, six hundred forty".