674543357721 has 16 divisors (see below), whose sum is σ = 1006030368000. Its totient is φ = 446677478064.

The previous prime is 674543357693. The next prime is 674543357749. The reversal of 674543357721 is 127753345476.

674543357721 is a `hidden beast` number, since 6 + 7 + 4 + 5 + 43 + 3 + 577 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (674543357693) and next prime (674543357749).

It is not a de Polignac number, because 674543357721 - 2¹⁷ = 674543226649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (674543355721) 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, 83831841 + ... + 83839886.

It is an arithmetic number, because the mean of its divisors is an integer number (62876898000).

Almost surely, 2^674543357721 is an apocalyptic number.

It is an amenable number.

674543357721 is a deficient number, since it is larger than the sum of its proper divisors (331487010279).

674543357721 is a wasteful number, since it uses less digits than its factorization.

674543357721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167671885 (or 167671879 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 54.

The spelling of 674543357721 in words is "six hundred seventy-four billion, five hundred forty-three million, three hundred fifty-seven thousand, seven hundred twenty-one".