61264021069 has 2 divisors, whose sum is σ = 61264021070. Its totient is φ = 61264021068.

The previous prime is 61264020989. The next prime is 61264021081. The reversal of 61264021069 is 96012046216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52092128169 + 9171892900 = 228237^2 + 95770^2 .

It is a cyclic number.

It is not a de Polignac number, because 61264021069 - 2¹³ = 61264012877 is a prime.

It is a super-2 number, since 2×61264021069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61264021769) 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, 30632010534 + 30632010535.

It is an arithmetic number, because the mean of its divisors is an integer number (30632010535).

Almost surely, 2^61264021069 is an apocalyptic number.

It is an amenable number.

61264021069 is a deficient number, since it is larger than the sum of its proper divisors (1).

61264021069 is an equidigital number, since it uses as much as digits as its factorization.

61264021069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 61264021069 in words is "sixty-one billion, two hundred sixty-four million, twenty-one thousand, sixty-nine".