61893688321 has 16 divisors (see below), whose sum is σ = 66785292288. Its totient is φ = 57192181200.

The previous prime is 61893688313. The next prime is 61893688361. The reversal of 61893688321 is 12388639816.

It is a cyclic number.

It is not a de Polignac number, because 61893688321 - 2³ = 61893688313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61893688361) 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, 331110 + ... + 483136.

It is an arithmetic number, because the mean of its divisors is an integer number (4174080768).

Almost surely, 2^61893688321 is an apocalyptic number.

It is an amenable number.

61893688321 is a deficient number, since it is larger than the sum of its proper divisors (4891603967).

61893688321 is a wasteful number, since it uses less digits than its factorization.

61893688321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152652.

The product of its digits is 2985984, while the sum is 55.

The spelling of 61893688321 in words is "sixty-one billion, eight hundred ninety-three million, six hundred eighty-eight thousand, three hundred twenty-one".