1025599550 has 24 divisors (see below), whose sum is σ = 1920262512. Its totient is φ = 407520000.

The previous prime is 1025599541. The next prime is 1025599571. The reversal of 1025599550 is 559955201.

1025599550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1025599498 and 1025599507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60371 + ... + 75470.

It is an arithmetic number, because the mean of its divisors is an integer number (80010938).

Almost surely, 2^1025599550 is an apocalyptic number.

1025599550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1025599550 is a deficient number, since it is larger than the sum of its proper divisors (894662962).

1025599550 is a wasteful number, since it uses less digits than its factorization.

1025599550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136004 (or 135999 counting only the distinct ones).

The product of its (nonzero) digits is 101250, while the sum is 41.

The square root of 1025599550 is about 32024.9832162329. The cubic root of 1025599550 is about 1008.4613863433.

The spelling of 1025599550 in words is "one billion, twenty-five million, five hundred ninety-nine thousand, five hundred fifty".