748774781 has 16 divisors (see below), whose sum is σ = 818611200. Its totient is φ = 682477488.

The previous prime is 748774777. The next prime is 748774783. The reversal of 748774781 is 187477847.

It is a cyclic number.

It is not a de Polignac number, because 748774781 - 2² = 748774777 is a prime.

It is a super-2 number, since 2×748774781² = 1121327345323195922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (748774783) 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, 47900 + ... + 61578.

It is an arithmetic number, because the mean of its divisors is an integer number (51163200).

Almost surely, 2^748774781 is an apocalyptic number.

It is an amenable number.

748774781 is a deficient number, since it is larger than the sum of its proper divisors (69836419).

748774781 is a wasteful number, since it uses less digits than its factorization.

748774781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13808.

The product of its digits is 2458624, while the sum is 53.

The square root of 748774781 is about 27363.7493958704. The cubic root of 748774781 is about 908.0652777207.

The spelling of 748774781 in words is "seven hundred forty-eight million, seven hundred seventy-four thousand, seven hundred eighty-one".