77431969662 has 32 divisors (see below), whose sum is σ = 157581365760. Its totient is φ = 25360235040.

The previous prime is 77431969661. The next prime is 77431969679. The reversal of 77431969662 is 26696913477.

It is a junction number, because it is equal to n+sod(n) for n = 77431969596 and 77431969605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77431969661) 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 15 ways as a sum of consecutive naturals, for example, 185362 + ... + 434997.

It is an arithmetic number, because the mean of its divisors is an integer number (4924417680).

Almost surely, 2^77431969662 is an apocalyptic number.

77431969662 is an abundant number, since it is smaller than the sum of its proper divisors (80149396098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77431969662 is a wasteful number, since it uses less digits than its factorization.

77431969662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620728.

The product of its digits is 20575296, while the sum is 60.

The spelling of 77431969662 in words is "seventy-seven billion, four hundred thirty-one million, nine hundred sixty-nine thousand, six hundred sixty-two".