77406436731 has 64 divisors (see below), whose sum is σ = 113857228800. Its totient is φ = 46490526720.

The previous prime is 77406436729. The next prime is 77406436741. The reversal of 77406436731 is 13763460477.

It is not a de Polignac number, because 77406436731 - 2¹ = 77406436729 is a prime.

It is a super-2 number, since 2×77406436731² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77406436721) 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 63 ways as a sum of consecutive naturals, for example, 179597086 + ... + 179597516.

It is an arithmetic number, because the mean of its divisors is an integer number (1779019200).

Almost surely, 2^77406436731 is an apocalyptic number.

77406436731 is a deficient number, since it is larger than the sum of its proper divisors (36450792069).

77406436731 is a wasteful number, since it uses less digits than its factorization.

77406436731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036.

The product of its (nonzero) digits is 1778112, while the sum is 48.

The spelling of 77406436731 in words is "seventy-seven billion, four hundred six million, four hundred thirty-six thousand, seven hundred thirty-one".