64242676780 has 24 divisors (see below), whose sum is σ = 140775257952. Its totient is φ = 24579806592.

The previous prime is 64242676753. The next prime is 64242676787. The reversal of 64242676780 is 8767624246.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64242676787) 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 7 ways as a sum of consecutive naturals, for example, 69828537 + ... + 69829456.

It is an arithmetic number, because the mean of its divisors is an integer number (5865635748).

Almost surely, 2^64242676780 is an apocalyptic number.

It is an amenable number.

64242676780 is an abundant number, since it is smaller than the sum of its proper divisors (76532581172).

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

64242676780 is a wasteful number, since it uses less digits than its factorization.

64242676780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139658025 (or 139658023 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 52.

The spelling of 64242676780 in words is "sixty-four billion, two hundred forty-two million, six hundred seventy-six thousand, seven hundred eighty".