64845877742 has 4 divisors (see below), whose sum is σ = 97268816616. Its totient is φ = 32422938870.

The previous prime is 64845877741. The next prime is 64845877757. The reversal of 64845877742 is 24777854846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24777854846 = 2 ⋅12388927423.

It is a super-2 number, since 2×64845877742² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64845877741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16211469434 + ... + 16211469437.

It is an arithmetic number, because the mean of its divisors is an integer number (24317204154).

Almost surely, 2^64845877742 is an apocalyptic number.

64845877742 is a deficient number, since it is larger than the sum of its proper divisors (32422938874).

64845877742 is a wasteful number, since it uses less digits than its factorization.

64845877742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32422938873.

The product of its digits is 84295680, while the sum is 62.

The spelling of 64845877742 in words is "sixty-four billion, eight hundred forty-five million, eight hundred seventy-seven thousand, seven hundred forty-two".