851381746497 has 48 divisors (see below), whose sum is σ = 1251065088000. Its totient is φ = 557850337920.

The previous prime is 851381746489. The next prime is 851381746513. The reversal of 851381746497 is 794647183158.

851381746497 is a `hidden beast` number, since 8 + 5 + 1 + 3 + 81 + 7 + 464 + 97 = 666.

851381746497 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 851381746497 - 2³ = 851381746489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (851381746447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 295719904 + ... + 295722782.

It is an arithmetic number, because the mean of its divisors is an integer number (26063856000).

Almost surely, 2^851381746497 is an apocalyptic number.

It is an amenable number.

851381746497 is a deficient number, since it is larger than the sum of its proper divisors (399683341503).

851381746497 is a wasteful number, since it uses less digits than its factorization.

851381746497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278 (or 5275 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The spelling of 851381746497 in words is "eight hundred fifty-one billion, three hundred eighty-one million, seven hundred forty-six thousand, four hundred ninety-seven".