61486537921 has 8 divisors (see below), whose sum is σ = 62654295744. Its totient is φ = 60319062960.

The previous prime is 61486537867. The next prime is 61486537927. The reversal of 61486537921 is 12973568416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61486537921 - 2³¹ = 59339054273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61486537927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397276 + ... + 529906.

It is an arithmetic number, because the mean of its divisors is an integer number (7831786968).

Almost surely, 2^61486537921 is an apocalyptic number.

It is an amenable number.

61486537921 is a deficient number, since it is larger than the sum of its proper divisors (1167757823).

61486537921 is a wasteful number, since it uses less digits than its factorization.

61486537921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141431.

The product of its digits is 2177280, while the sum is 52.

The spelling of 61486537921 in words is "sixty-one billion, four hundred eighty-six million, five hundred thirty-seven thousand, nine hundred twenty-one".