261003853425 has 48 divisors (see below), whose sum is σ = 493506127872. Its totient is φ = 119235451200.

The previous prime is 261003853417. The next prime is 261003853441. The reversal of 261003853425 is 524358300162.

It is a happy number.

It is not a de Polignac number, because 261003853425 - 2³ = 261003853417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 613510 + ... + 947840.

It is an arithmetic number, because the mean of its divisors is an integer number (10281377664).

Almost surely, 2^261003853425 is an apocalyptic number.

261003853425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261003853425 is a deficient number, since it is larger than the sum of its proper divisors (232502274447).

261003853425 is a wasteful number, since it uses less digits than its factorization.

261003853425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335838 (or 335833 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 261003853425 in words is "two hundred sixty-one billion, three million, eight hundred fifty-three thousand, four hundred twenty-five".