61860800641 has 2 divisors, whose sum is σ = 61860800642. Its totient is φ = 61860800640.

The previous prime is 61860800581. The next prime is 61860800681. The reversal of 61860800641 is 14600806816.

It is an a-pointer prime, because the next prime (61860800681) can be obtained adding 61860800641 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35389510641 + 26471290000 = 188121^2 + 162700^2 .

It is a cyclic number.

It is not a de Polignac number, because 61860800641 - 2¹⁵ = 61860767873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61860800594 and 61860800603.

It is not a weakly prime, because it can be changed into another prime (61860800681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30930400320 + 30930400321.

It is an arithmetic number, because the mean of its divisors is an integer number (30930400321).

Almost surely, 2^61860800641 is an apocalyptic number.

It is an amenable number.

61860800641 is a deficient number, since it is larger than the sum of its proper divisors (1).

61860800641 is an equidigital number, since it uses as much as digits as its factorization.

61860800641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 61860800641 in words is "sixty-one billion, eight hundred sixty million, eight hundred thousand, six hundred forty-one".