4749640781 has 4 divisors (see below), whose sum is σ = 4751038272. Its totient is φ = 4748243292.

The previous prime is 4749640771. The next prime is 4749640799. The reversal of 4749640781 is 1870469474.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4749640781 - 2¹⁰ = 4749639757 is a prime.

It is a super-2 number, since 2×4749640781² = 45118175097076579922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4749640741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693635 + ... + 700448.

It is an arithmetic number, because the mean of its divisors is an integer number (1187759568).

Almost surely, 2^4749640781 is an apocalyptic number.

It is an amenable number.

4749640781 is a deficient number, since it is larger than the sum of its proper divisors (1397491).

4749640781 is a wasteful number, since it uses less digits than its factorization.

4749640781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397490.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The square root of 4749640781 is about 68917.6376626477. The cubic root of 4749640781 is about 1680.9453274034.

The spelling of 4749640781 in words is "four billion, seven hundred forty-nine million, six hundred forty thousand, seven hundred eighty-one".