261503229252 has 24 divisors (see below), whose sum is σ = 610186254496. Its totient is φ = 87166021248.

The previous prime is 261503229203. The next prime is 261503229287. The reversal of 261503229252 is 252922305162.

It is a self number, because there is not a number n which added to its sum of digits gives 261503229252.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517308 + ... + 889164.

Almost surely, 2^261503229252 is an apocalyptic number.

It is an amenable number.

261503229252 is an abundant number, since it is smaller than the sum of its proper divisors (348683025244).

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

261503229252 is a wasteful number, since it uses less digits than its factorization.

261503229252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430467 (or 430465 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 261503229252 in words is "two hundred sixty-one billion, five hundred three million, two hundred twenty-nine thousand, two hundred fifty-two".