75777487493 has 24 divisors (see below), whose sum is σ = 78531029280. Its totient is φ = 73114248480.

The previous prime is 75777487469. The next prime is 75777487531. The reversal of 75777487493 is 39478477757.

It is a de Polignac number, because none of the positive numbers 2^k-75777487493 is a prime.

It is a super-2 number, since 2×75777487493² (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 (75777487433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65156330 + ... + 65157492.

It is an arithmetic number, because the mean of its divisors is an integer number (3272126220).

Almost surely, 2^75777487493 is an apocalyptic number.

It is an amenable number.

75777487493 is a deficient number, since it is larger than the sum of its proper divisors (2753541787).

75777487493 is a wasteful number, since it uses less digits than its factorization.

75777487493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649 (or 1606 counting only the distinct ones).

The product of its digits is 290424960, while the sum is 68.

The spelling of 75777487493 in words is "seventy-five billion, seven hundred seventy-seven million, four hundred eighty-seven thousand, four hundred ninety-three".