1625068309649 has 4 divisors (see below), whose sum is σ = 1626388431360. Its totient is φ = 1623748187940.

The previous prime is 1625068309643. The next prime is 1625068309693. The reversal of 1625068309649 is 9469038605261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1625068309649 is a prime.

It is a super-2 number, since 2×1625068309649² (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 (1625068309643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660059009 + ... + 660061470.

It is an arithmetic number, because the mean of its divisors is an integer number (406597107840).

Almost surely, 2^{1625068309649} is an apocalyptic number.

It is an amenable number.

1625068309649 is a deficient number, since it is larger than the sum of its proper divisors (1320121711).

1625068309649 is a wasteful number, since it uses less digits than its factorization.

1625068309649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320121710.

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 1625068309649 in words is "one trillion, six hundred twenty-five billion, sixty-eight million, three hundred nine thousand, six hundred forty-nine".