1406945825625 has 20 divisors (see below), whose sum is σ = 2344159341392. Its totient is φ = 750371106000.

The previous prime is 1406945825581. The next prime is 1406945825627. The reversal of 1406945825625 is 5265285496041.

It is not a de Polignac number, because 1406945825625 - 2²² = 1406941631321 is a prime.

It is a super-2 number, since 2×1406945825625² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1406945825627) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 375183679 + ... + 375187428.

Almost surely, 2^{1406945825625} is an apocalyptic number.

1406945825625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1406945825625 is a deficient number, since it is larger than the sum of its proper divisors (937213515767).

1406945825625 is an frugal number, since it uses more digits than its factorization.

1406945825625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750371130 (or 750371115 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 57.

The spelling of 1406945825625 in words is "one trillion, four hundred six billion, nine hundred forty-five million, eight hundred twenty-five thousand, six hundred twenty-five".