261196633476 has 45 divisors (see below), whose sum is σ = 682843644021. Its totient is φ = 87062478048.

The previous prime is 261196633471. The next prime is 261196633519. The reversal of 261196633476 is 674336691162.

The square root of 261196633476 is 511074.

It is a perfect power (a square), and thus also a powerful number.

261196633476 is a `hidden beast` number, since 26 + 1 + 1 + 96 + 63 + 3 + 476 = 666.

It can be written as a sum of positive squares in only one way, i.e., 255014900100 + 6181733376 = 504990^2 + 78624^2 .

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

It is not an unprimeable number, because it can be changed into a prime (261196633471) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 9185136 + ... + 9213528.

Almost surely, 2^261196633476 is an apocalyptic number.

261196633476 is the 511074-th square number.

It is an amenable number.

261196633476 is an abundant number, since it is smaller than the sum of its proper divisors (421647010545).

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

261196633476 is an frugal number, since it uses more digits than its factorization.

261196633476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56802 (or 28398 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 54.

The spelling of 261196633476 in words is "two hundred sixty-one billion, one hundred ninety-six million, six hundred thirty-three thousand, four hundred seventy-six".