261200049652 has 12 divisors (see below), whose sum is σ = 457111061316. Its totient is φ = 130596889280.

The previous prime is 261200049629. The next prime is 261200049659. The reversal of 261200049652 is 256940002162.

It can be written as a sum of positive squares in 2 ways, for example, as 34523126416 + 226676923236 = 185804^2 + 476106^2 .

It is a super-2 number, since 2×261200049652² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261200049659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591193 + ... + 933760.

It is an arithmetic number, because the mean of its divisors is an integer number (38092588443).

Almost surely, 2^261200049652 is an apocalyptic number.

It is an amenable number.

261200049652 is a deficient number, since it is larger than the sum of its proper divisors (195911011664).

261200049652 is a wasteful number, since it uses less digits than its factorization.

261200049652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567778 (or 1567776 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 261200049652 in words is "two hundred sixty-one billion, two hundred million, forty-nine thousand, six hundred fifty-two".