64736267880 has 32 divisors (see below), whose sum is σ = 194208804000. Its totient is φ = 17263004736.

The previous prime is 64736267879. The next prime is 64736267887. The reversal of 64736267880 is 8876263746.

It is a super-2 number, since 2×64736267880² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64736267880.

It is not an unprimeable number, because it can be changed into a prime (64736267887) 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, 269734330 + ... + 269734569.

It is an arithmetic number, because the mean of its divisors is an integer number (6069025125).

Almost surely, 2^64736267880 is an apocalyptic number.

64736267880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64736267880 is an abundant number, since it is smaller than the sum of its proper divisors (129472536120).

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

64736267880 is a wasteful number, since it uses less digits than its factorization.

64736267880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539468913 (or 539468909 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 57.

The spelling of 64736267880 in words is "sixty-four billion, seven hundred thirty-six million, two hundred sixty-seven thousand, eight hundred eighty".