4777813381 has 6 divisors (see below), whose sum is σ = 5251646246. Its totient is φ = 4343466600.

The previous prime is 4777813357. The next prime is 4777813393. The reversal of 4777813381 is 1833187774.

It can be written as a sum of positive squares in only one way, i.e., 4290905025 + 486908356 = 65505^2 + 22066^2 .

It is not a de Polignac number, because 4777813381 - 2¹⁵ = 4777780613 is a prime.

It is a super-2 number, since 2×4777813381² = 45655001407325302322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4777813301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19742910 + ... + 19743151.

Almost surely, 2^4777813381 is an apocalyptic number.

It is an amenable number.

4777813381 is a deficient number, since it is larger than the sum of its proper divisors (473832865).

4777813381 is a wasteful number, since it uses less digits than its factorization.

4777813381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39486083 (or 39486072 counting only the distinct ones).

The product of its digits is 790272, while the sum is 49.

The square root of 4777813381 is about 69121.7287182547. The cubic root of 4777813381 is about 1684.2622993316.

The spelling of 4777813381 in words is "four billion, seven hundred seventy-seven million, eight hundred thirteen thousand, three hundred eighty-one".