74463640061 has 2 divisors, whose sum is σ = 74463640062. Its totient is φ = 74463640060.

The previous prime is 74463640051. The next prime is 74463640079. The reversal of 74463640061 is 16004636447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73370015161 + 1093624900 = 270869^2 + 33070^2 .

It is a cyclic number.

It is not a de Polignac number, because 74463640061 - 2¹⁴ = 74463623677 is a prime.

It is a super-2 number, since 2×74463640061² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74463640001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37231820030 + 37231820031.

It is an arithmetic number, because the mean of its divisors is an integer number (37231820031).

Almost surely, 2^74463640061 is an apocalyptic number.

It is an amenable number.

74463640061 is a deficient number, since it is larger than the sum of its proper divisors (1).

74463640061 is an equidigital number, since it uses as much as digits as its factorization.

74463640061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 74463640061 in words is "seventy-four billion, four hundred sixty-three million, six hundred forty thousand, sixty-one".