61886015361 has 45 divisors (see below), whose sum is σ = 93601700049. Its totient is φ = 40748362200.

The previous prime is 61886015353. The next prime is 61886015393. The reversal of 61886015361 is 16351068816.

The square root of 61886015361 is 248769.

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

61886015361 is a `hidden beast` number, since 6 + 1 + 8 + 8 + 601 + 5 + 36 + 1 = 666.

It is not a de Polignac number, because 61886015361 - 2³ = 61886015353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61886011361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 293298546 + ... + 293298756.

Almost surely, 2^61886015361 is an apocalyptic number.

61886015361 is the 248769-th square number.

61886015361 is the 124385-th centered octagonal number.

It is an amenable number.

61886015361 is a deficient number, since it is larger than the sum of its proper divisors (31715684688).

61886015361 is an frugal number, since it uses more digits than its factorization.

61886015361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 61886015361 in words is "sixty-one billion, eight hundred eighty-six million, fifteen thousand, three hundred sixty-one".