73775477791 has 4 divisors (see below), whose sum is σ = 75167467992. Its totient is φ = 72383487592.

The previous prime is 73775477771. The next prime is 73775477807. The reversal of 73775477791 is 19777457737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19777457737 = 14087 ⋅1403951.

It is a cyclic number.

It is not a de Polignac number, because 73775477791 - 2³¹ = 71627994143 is a prime.

It is a super-2 number, since 2×73775477791² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73775477771) 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 in 3 ways as a sum of consecutive naturals, for example, 695995021 + ... + 695995126.

It is an arithmetic number, because the mean of its divisors is an integer number (18791866998).

Almost surely, 2^73775477791 is an apocalyptic number.

73775477791 is a deficient number, since it is larger than the sum of its proper divisors (1391990201).

73775477791 is a wasteful number, since it uses less digits than its factorization.

73775477791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391990200.

The product of its digits is 63530460, while the sum is 64.

The spelling of 73775477791 in words is "seventy-three billion, seven hundred seventy-five million, four hundred seventy-seven thousand, seven hundred ninety-one".