718771481 has 4 divisors (see below), whose sum is σ = 718829364. Its totient is φ = 718713600.

The previous prime is 718771447. The next prime is 718771489. The reversal of 718771481 is 184177817.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 100801600 + 617969881 = 10040^2 + 24859^2 .

It is a cyclic number.

It is not a de Polignac number, because 718771481 - 2¹⁴ = 718755097 is a prime.

It is a super-2 number, since 2×718771481² = 1033264883797866722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (718771489) 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, 1880 + ... + 37961.

It is an arithmetic number, because the mean of its divisors is an integer number (179707341).

Almost surely, 2^718771481 is an apocalyptic number.

It is an amenable number.

718771481 is a deficient number, since it is larger than the sum of its proper divisors (57883).

718771481 is a wasteful number, since it uses less digits than its factorization.

718771481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57882.

The product of its digits is 87808, while the sum is 44.

The square root of 718771481 is about 26809.9138566315. The cubic root of 718771481 is about 895.7708914276.

The spelling of 718771481 in words is "seven hundred eighteen million, seven hundred seventy-one thousand, four hundred eighty-one".