1025613640 has 64 divisors (see below), whose sum is σ = 2368776960. Its totient is φ = 399436800.

The previous prime is 1025613601. The next prime is 1025613643. The reversal of 1025613640 is 463165201.

1025613640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1025613599 and 1025613608.

It is not an unprimeable number, because it can be changed into a prime (1025613643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688977 + ... + 690463.

It is an arithmetic number, because the mean of its divisors is an integer number (37012140).

Almost surely, 2^1025613640 is an apocalyptic number.

1025613640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1025613640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184388480).

1025613640 is an abundant number, since it is smaller than the sum of its proper divisors (1343163320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1025613640 is a wasteful number, since it uses less digits than its factorization.

1025613640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1025613640 is about 32025.2031999799. The cubic root of 1025613640 is about 1008.4660045057.

Adding to 1025613640 its reverse (463165201), we get a palindrome (1488778841).

The spelling of 1025613640 in words is "one billion, twenty-five million, six hundred thirteen thousand, six hundred forty".