4672157778 has 18 divisors (see below), whose sum is σ = 10123636887. Its totient is φ = 1557289260.

The previous prime is 4672157761. The next prime is 4672157807. The reversal of 4672157778 is 8777512764.

4672157778 is a `hidden beast` number, since 4 + 67 + 2 + 1 + 577 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2336078889 + 2336078889 = 48333^2 + 48333^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=48333.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 281943 + ... + 298053.

Almost surely, 2^4672157778 is an apocalyptic number.

4672157778 is an abundant number, since it is smaller than the sum of its proper divisors (5451479109).

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

4672157778 is an frugal number, since it uses more digits than its factorization.

4672157778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32230 (or 16116 counting only the distinct ones).

The product of its digits is 4609920, while the sum is 54.

The square root of 4672157778 is about 68353.1841101788. The cubic root of 4672157778 is about 1671.7544970558.

The spelling of 4672157778 in words is "four billion, six hundred seventy-two million, one hundred fifty-seven thousand, seven hundred seventy-eight".