61261333630 has 32 divisors (see below), whose sum is σ = 126033822720. Its totient is φ = 21002134560.

The previous prime is 61261333619. The next prime is 61261333633. The reversal of 61261333630 is 3633316216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61261333633) 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, 1030251 + ... + 1088089.

It is an arithmetic number, because the mean of its divisors is an integer number (3938556960).

Almost surely, 2^61261333630 is an apocalyptic number.

61261333630 is an abundant number, since it is smaller than the sum of its proper divisors (64772489090).

61261333630 is a wasteful number, since it uses less digits than its factorization.

61261333630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72984.

The product of its (nonzero) digits is 34992, while the sum is 34.

Adding to 61261333630 its reverse (3633316216), we get a palindrome (64894649846).

The spelling of 61261333630 in words is "sixty-one billion, two hundred sixty-one million, three hundred thirty-three thousand, six hundred thirty".