61501334321 has 16 divisors (see below), whose sum is σ = 71763557376. Its totient is φ = 51617616336.

The previous prime is 61501334309. The next prime is 61501334329. The reversal of 61501334321 is 12343310516.

61501334321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61501334321 - 2¹⁰ = 61501333297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61501334329) 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, 314291 + ... + 470936.

It is an arithmetic number, because the mean of its divisors is an integer number (4485222336).

Almost surely, 2^61501334321 is an apocalyptic number.

It is an amenable number.

61501334321 is a deficient number, since it is larger than the sum of its proper divisors (10262223055).

61501334321 is a wasteful number, since it uses less digits than its factorization.

61501334321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785468.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 61501334321 its reverse (12343310516), we get a palindrome (73844644837).

The spelling of 61501334321 in words is "sixty-one billion, five hundred one million, three hundred thirty-four thousand, three hundred twenty-one".