1275407853687 has 48 divisors (see below), whose sum is σ = 2038456682496. Its totient is φ = 761931576000.

The previous prime is 1275407853673. The next prime is 1275407853691. The reversal of 1275407853687 is 7863587045721.

It is a happy number.

1275407853687 is a `hidden beast` number, since 1 + 2 + 7 + 540 + 7 + 8 + 5 + 3 + 6 + 87 = 666.

It is not a de Polignac number, because 1275407853687 - 2⁸ = 1275407853431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275407853607) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40689273 + ... + 40720605.

It is an arithmetic number, because the mean of its divisors is an integer number (42467847552).

Almost surely, 2^{1275407853687} is an apocalyptic number.

1275407853687 is a deficient number, since it is larger than the sum of its proper divisors (763048828809).

1275407853687 is a wasteful number, since it uses less digits than its factorization.

1275407853687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37212 (or 37209 counting only the distinct ones).

The product of its (nonzero) digits is 79027200, while the sum is 63.

The spelling of 1275407853687 in words is "one trillion, two hundred seventy-five billion, four hundred seven million, eight hundred fifty-three thousand, six hundred eighty-seven".