4721764778660 has 48 divisors (see below), whose sum is σ = 10243424658432. Its totient is φ = 1826376854400.

The previous prime is 4721764778639. The next prime is 4721764778663. The reversal of 4721764778660 is 668774671274.

It is not an unprimeable number, because it can be changed into a prime (4721764778663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2114531 + ... + 3730250.

It is an arithmetic number, because the mean of its divisors is an integer number (213404680384).

Almost surely, 2^{4721764778660} is an apocalyptic number.

It is an amenable number.

4721764778660 is an abundant number, since it is smaller than the sum of its proper divisors (5521659879772).

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

4721764778660 is a wasteful number, since it uses less digits than its factorization.

4721764778660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5846124 (or 5846122 counting only the distinct ones).

The product of its (nonzero) digits is 132765696, while the sum is 65.

The spelling of 4721764778660 in words is "four trillion, seven hundred twenty-one billion, seven hundred sixty-four million, seven hundred seventy-eight thousand, six hundred sixty".