61593937921 has 2 divisors, whose sum is σ = 61593937922. Its totient is φ = 61593937920.

The previous prime is 61593937903. The next prime is 61593937939. The reversal of 61593937921 is 12973939516.

It is a balanced prime because it is at equal distance from previous prime (61593937903) and next prime (61593937939).

It can be written as a sum of positive squares in only one way, i.e., 60762250000 + 831687921 = 246500^2 + 28839^2 .

It is a cyclic number.

It is not a de Polignac number, because 61593937921 - 2⁹ = 61593937409 is a prime.

It is not a weakly prime, because it can be changed into another prime (61593937421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30796968960 + 30796968961.

It is an arithmetic number, because the mean of its divisors is an integer number (30796968961).

Almost surely, 2^61593937921 is an apocalyptic number.

It is an amenable number.

61593937921 is a deficient number, since it is larger than the sum of its proper divisors (1).

61593937921 is an equidigital number, since it uses as much as digits as its factorization.

61593937921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2755620, while the sum is 55.

The spelling of 61593937921 in words is "sixty-one billion, five hundred ninety-three million, nine hundred thirty-seven thousand, nine hundred twenty-one".