649910741391 has 12 divisors (see below), whose sum is σ = 939210663768. Its totient is φ = 433065810384.

The previous prime is 649910741357. The next prime is 649910741399. The reversal of 649910741391 is 193147019946.

649910741391 is a `hidden beast` number, since 6 + 499 + 10 + 7 + 4 + 139 + 1 = 666.

It is not a de Polignac number, because 649910741391 - 2²¹ = 649908644239 is a prime.

It is a super-2 number, since 2×649910741391² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649910741399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17314980 + ... + 17352473.

It is an arithmetic number, because the mean of its divisors is an integer number (78267555314).

Almost surely, 2^649910741391 is an apocalyptic number.

649910741391 is a deficient number, since it is larger than the sum of its proper divisors (289299922377).

649910741391 is a wasteful number, since it uses less digits than its factorization.

649910741391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34669542 (or 34669539 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 649910741391 in words is "six hundred forty-nine billion, nine hundred ten million, seven hundred forty-one thousand, three hundred ninety-one".