1278752537625 has 16 divisors (see below), whose sum is σ = 2127844223232. Its totient is φ = 682001353200.

The previous prime is 1278752537593. The next prime is 1278752537633. The reversal of 1278752537625 is 5267352578721.

It is not a de Polignac number, because 1278752537625 - 2⁵ = 1278752537593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1705003009 + ... + 1705003758.

It is an arithmetic number, because the mean of its divisors is an integer number (132990263952).

Almost surely, 2^{1278752537625} is an apocalyptic number.

1278752537625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1278752537625 is a deficient number, since it is larger than the sum of its proper divisors (849091685607).

1278752537625 is an equidigital number, since it uses as much as digits as its factorization.

1278752537625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410006785 (or 3410006775 counting only the distinct ones).

The product of its digits is 49392000, while the sum is 60.

The spelling of 1278752537625 in words is "one trillion, two hundred seventy-eight billion, seven hundred fifty-two million, five hundred thirty-seven thousand, six hundred twenty-five".