672745563693 has 128 divisors (see below), whose sum is σ = 1205966028800. Its totient is φ = 362081539584.

The previous prime is 672745563661. The next prime is 672745563697. The reversal of 672745563693 is 396365547276.

672745563693 is a `hidden beast` number, since 6 + 7 + 2 + 7 + 4 + 5 + 563 + 69 + 3 = 666.

It is not a de Polignac number, because 672745563693 - 2⁵ = 672745563661 is a prime.

It is a super-2 number, since 2×672745563693² (a number of 24 digits) contains 22 as substring.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 672745563693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672745563697) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 602278371 + ... + 602279487.

It is an arithmetic number, because the mean of its divisors is an integer number (9421609600).

Almost surely, 2^672745563693 is an apocalyptic number.

672745563693 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

672745563693 is a deficient number, since it is larger than the sum of its proper divisors (533220465107).

672745563693 is a wasteful number, since it uses less digits than its factorization.

672745563693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976 (or 1970 counting only the distinct ones).

The product of its digits is 171460800, while the sum is 63.

The spelling of 672745563693 in words is "six hundred seventy-two billion, seven hundred forty-five million, five hundred sixty-three thousand, six hundred ninety-three".