61502603321 has 4 divisors (see below), whose sum is σ = 61503162000. Its totient is φ = 61502044644.

The previous prime is 61502603317. The next prime is 61502603341. The reversal of 61502603321 is 12330620516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61502603321 - 2² = 61502603317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61502603311) 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 3 ways as a sum of consecutive naturals, for example, 53171 + ... + 354728.

It is an arithmetic number, because the mean of its divisors is an integer number (15375790500).

Almost surely, 2^61502603321 is an apocalyptic number.

It is an amenable number.

61502603321 is a deficient number, since it is larger than the sum of its proper divisors (558679).

61502603321 is a wasteful number, since it uses less digits than its factorization.

61502603321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558678.

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

The spelling of 61502603321 in words is "sixty-one billion, five hundred two million, six hundred three thousand, three hundred twenty-one".