74877161265689 has 2 divisors, whose sum is σ = 74877161265690. Its totient is φ = 74877161265688.

The previous prime is 74877161265661. The next prime is 74877161265727. The reversal of 74877161265689 is 98656216177847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70046990270464 + 4830170995225 = 8369408^2 + 2197765^2 .

It is a cyclic number.

It is not a de Polignac number, because 74877161265689 - 2³² = 74872866298393 is a prime.

It is a super-3 number, since 3×74877161265689³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (74877163265689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37438580632844 + 37438580632845.

It is an arithmetic number, because the mean of its divisors is an integer number (37438580632845).

Almost surely, 2^{74877161265689} is an apocalyptic number.

It is an amenable number.

74877161265689 is a deficient number, since it is larger than the sum of its proper divisors (1).

74877161265689 is an equidigital number, since it uses as much as digits as its factorization.

74877161265689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1706987520, while the sum is 77.

The spelling of 74877161265689 in words is "seventy-four trillion, eight hundred seventy-seven billion, one hundred sixty-one million, two hundred sixty-five thousand, six hundred eighty-nine".