64838739771 has 12 divisors (see below), whose sum is σ = 100860262048. Its totient is φ = 39900762864.

The previous prime is 64838739733. The next prime is 64838739773. The reversal of 64838739771 is 17793783846.

64838739771 is a `hidden beast` number, since 6 + 483 + 87 + 3 + 9 + 7 + 71 = 666.

It is not a de Polignac number, because 64838739771 - 2⁷ = 64838739643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64838739699 and 64838739708.

It is not an unprimeable number, because it can be changed into a prime (64838739773) 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 11 ways as a sum of consecutive naturals, for example, 277088515 + ... + 277088748.

Almost surely, 2^64838739771 is an apocalyptic number.

64838739771 is a deficient number, since it is larger than the sum of its proper divisors (36021522277).

64838739771 is a wasteful number, since it uses less digits than its factorization.

64838739771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554177282 (or 554177279 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 63.

It can be divided in two parts, 64838 and 739771, that added together give a square (804609 = 897²).

The spelling of 64838739771 in words is "sixty-four billion, eight hundred thirty-eight million, seven hundred thirty-nine thousand, seven hundred seventy-one".