6473730722781 has 64 divisors (see below), whose sum is σ = 10259529984000. Its totient is φ = 3552601656576.

The previous prime is 6473730722773. The next prime is 6473730722813. The reversal of 6473730722781 is 1872270373746.

It is not a de Polignac number, because 6473730722781 - 2³ = 6473730722773 is a prime.

It is a super-2 number, since 2×6473730722781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6473730722581) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 744188170 + ... + 744196868.

It is an arithmetic number, because the mean of its divisors is an integer number (160305156000).

Almost surely, 2^{6473730722781} is an apocalyptic number.

It is an amenable number.

6473730722781 is a deficient number, since it is larger than the sum of its proper divisors (3785799261219).

6473730722781 is a wasteful number, since it uses less digits than its factorization.

6473730722781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15138.

The product of its (nonzero) digits is 16595712, while the sum is 57.

The spelling of 6473730722781 in words is "six trillion, four hundred seventy-three billion, seven hundred thirty million, seven hundred twenty-two thousand, seven hundred eighty-one".