261254660036 has 48 divisors (see below), whose sum is σ = 468532512000. Its totient is φ = 127408135680.

The previous prime is 261254660033. The next prime is 261254660041. The reversal of 261254660036 is 630066452162.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 261254659975 and 261254660002.

It is not an unprimeable number, because it can be changed into a prime (261254660033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122023526 + ... + 122025666.

It is an arithmetic number, because the mean of its divisors is an integer number (9761094000).

Almost surely, 2^261254660036 is an apocalyptic number.

It is an amenable number.

261254660036 is a deficient number, since it is larger than the sum of its proper divisors (207277851964).

261254660036 is a wasteful number, since it uses less digits than its factorization.

261254660036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124 (or 4122 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 261254660036 in words is "two hundred sixty-one billion, two hundred fifty-four million, six hundred sixty thousand, thirty-six".