1025313644 has 18 divisors (see below), whose sum is σ = 1893708684. Its totient is φ = 485674200.

The previous prime is 1025313631. The next prime is 1025313649. The reversal of 1025313644 is 4463135201.

It is not an unprimeable number, because it can be changed into a prime (1025313649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 353582 + ... + 356469.

It is an arithmetic number, because the mean of its divisors is an integer number (105206038).

Almost surely, 2^1025313644 is an apocalyptic number.

It is an amenable number.

1025313644 is a deficient number, since it is larger than the sum of its proper divisors (868395040).

1025313644 is a wasteful number, since it uses less digits than its factorization.

1025313644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710093 (or 710072 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1025313644 is about 32020.5191088464. The cubic root of 1025313644 is about 1008.3676681673.

Adding to 1025313644 its reverse (4463135201), we get a palindrome (5488448845).

The spelling of 1025313644 in words is "one billion, twenty-five million, three hundred thirteen thousand, six hundred forty-four".