77742235436 has 24 divisors (see below), whose sum is σ = 139571598096. Its totient is φ = 37876547520.

The previous prime is 77742235433. The next prime is 77742235469. The reversal of 77742235436 is 63453224777.

It is a super-2 number, since 2×77742235436² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77742235433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1462751 + ... + 1514966.

It is an arithmetic number, because the mean of its divisors is an integer number (5815483254).

Almost surely, 2^77742235436 is an apocalyptic number.

It is an amenable number.

77742235436 is a deficient number, since it is larger than the sum of its proper divisors (61829362660).

77742235436 is a wasteful number, since it uses less digits than its factorization.

77742235436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977889 (or 2977887 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 50.

The spelling of 77742235436 in words is "seventy-seven billion, seven hundred forty-two million, two hundred thirty-five thousand, four hundred thirty-six".