674148538791 has 24 divisors (see below), whose sum is σ = 1198486292640. Its totient is φ = 355594833216.

The previous prime is 674148538771. The next prime is 674148538807. The reversal of 674148538791 is 197835841476.

674148538791 is a `hidden beast` number, since 6 + 7 + 4 + 1 + 4 + 8 + 538 + 7 + 91 = 666.

It is not a de Polignac number, because 674148538791 - 2⁶ = 674148538727 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674148538751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 411567276 + ... + 411568913.

It is an arithmetic number, because the mean of its divisors is an integer number (49936928860).

Almost surely, 2^674148538791 is an apocalyptic number.

674148538791 is a deficient number, since it is larger than the sum of its proper divisors (524337753849).

674148538791 is a wasteful number, since it uses less digits than its factorization.

674148538791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823136215 (or 823136212 counting only the distinct ones).

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

The spelling of 674148538791 in words is "six hundred seventy-four billion, one hundred forty-eight million, five hundred thirty-eight thousand, seven hundred ninety-one".