61921710623 has 2 divisors, whose sum is σ = 61921710624. Its totient is φ = 61921710622.

The previous prime is 61921710577. The next prime is 61921710649. The reversal of 61921710623 is 32601712916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61921710623 - 2¹⁰ = 61921709599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61921710023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30960855311 + 30960855312.

It is an arithmetic number, because the mean of its divisors is an integer number (30960855312).

Almost surely, 2^61921710623 is an apocalyptic number.

61921710623 is a deficient number, since it is larger than the sum of its proper divisors (1).

61921710623 is an equidigital number, since it uses as much as digits as its factorization.

61921710623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 61921710623 in words is "sixty-one billion, nine hundred twenty-one million, seven hundred ten thousand, six hundred twenty-three".