1025815650 has 48 divisors (see below), whose sum is σ = 2585751168. Its totient is φ = 269064000.

The previous prime is 1025815621. The next prime is 1025815657. The reversal of 1025815650 is 565185201.

It is not an unprimeable number, because it can be changed into a prime (1025815657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46906 + ... + 65205.

It is an arithmetic number, because the mean of its divisors is an integer number (53869816).

Almost surely, 2^1025815650 is an apocalyptic number.

1025815650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1025815650 is an abundant number, since it is smaller than the sum of its proper divisors (1559935518).

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

1025815650 is a wasteful number, since it uses less digits than its factorization.

1025815650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112187 (or 112182 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 1025815650 is about 32028.3569669129. The cubic root of 1025815650 is about 1008.5322109977.

The spelling of 1025815650 in words is "one billion, twenty-five million, eight hundred fifteen thousand, six hundred fifty".