61381221286 has 32 divisors (see below), whose sum is σ = 120832485120. Its totient is φ = 22656088800.

The previous prime is 61381221259. The next prime is 61381221289. The reversal of 61381221286 is 68212218316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61381221289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10486005 + ... + 10491856.

It is an arithmetic number, because the mean of its divisors is an integer number (3776015160).

Almost surely, 2^61381221286 is an apocalyptic number.

61381221286 is a deficient number, since it is larger than the sum of its proper divisors (59451263834).

61381221286 is a wasteful number, since it uses less digits than its factorization.

61381221286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20977900.

The product of its digits is 55296, while the sum is 40.

The spelling of 61381221286 in words is "sixty-one billion, three hundred eighty-one million, two hundred twenty-one thousand, two hundred eighty-six".