261379354248 has 40 divisors (see below), whose sum is σ = 732104211630. Its totient is φ = 87126451200.

The previous prime is 261379354157. The next prime is 261379354289. The reversal of 261379354248 is 842453973162.

261379354248 is a `hidden beast` number, since 2 + 6 + 1 + 3 + 7 + 93 + 542 + 4 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 214481986884 + 46897367364 = 463122^2 + 216558^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 261379354194 and 261379354203.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 201680953 + ... + 201682248.

Almost surely, 2^261379354248 is an apocalyptic number.

It is an amenable number.

261379354248 is an abundant number, since it is smaller than the sum of its proper divisors (470724857382).

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

261379354248 is a wasteful number, since it uses less digits than its factorization.

261379354248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403363219 (or 403363206 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 261379354248 in words is "two hundred sixty-one billion, three hundred seventy-nine million, three hundred fifty-four thousand, two hundred forty-eight".