672431356861 has 32 divisors (see below), whose sum is σ = 748534884480. Its totient is φ = 603980657280.

The previous prime is 672431356847. The next prime is 672431356867. The reversal of 672431356861 is 168653134276.

It is not a de Polignac number, because 672431356861 - 2¹³ = 672431348669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 672431356799 and 672431356808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672431356867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37396105 + ... + 37414081.

It is an arithmetic number, because the mean of its divisors is an integer number (23391715140).

Almost surely, 2^672431356861 is an apocalyptic number.

It is an amenable number.

672431356861 is a deficient number, since it is larger than the sum of its proper divisors (76103527619).

672431356861 is a wasteful number, since it uses less digits than its factorization.

672431356861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18346 (or 18324 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The spelling of 672431356861 in words is "six hundred seventy-two billion, four hundred thirty-one million, three hundred fifty-six thousand, eight hundred sixty-one".