7491852781 has 16 divisors (see below), whose sum is σ = 8797999104. Its totient is φ = 6246355824.

The previous prime is 7491852773. The next prime is 7491852793. The reversal of 7491852781 is 1872581947.

7491852781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7491852781 - 2³ = 7491852773 is a prime.

It is a super-2 number, since 2×7491852781² (a number of 21 digits) 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 (7491852701) 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, 16225 + ... + 123478.

It is an arithmetic number, because the mean of its divisors is an integer number (549874944).

Almost surely, 2^7491852781 is an apocalyptic number.

It is an amenable number.

7491852781 is a deficient number, since it is larger than the sum of its proper divisors (1306146323).

7491852781 is a wasteful number, since it uses less digits than its factorization.

7491852781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139920.

The product of its digits is 1128960, while the sum is 52.

The square root of 7491852781 is about 86555.4896063791. The cubic root of 7491852781 is about 1956.7247796902.

The spelling of 7491852781 in words is "seven billion, four hundred ninety-one million, eight hundred fifty-two thousand, seven hundred eighty-one".