1672354779571 has 72 divisors (see below), whose sum is σ = 2179927425600. Its totient is φ = 1275416029440.

The previous prime is 1672354779523. The next prime is 1672354779577. The reversal of 1672354779571 is 1759774532761.

It is not a de Polignac number, because 1672354779571 - 2⁷ = 1672354779443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1672354779577) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 132101640 + ... + 132114298.

It is an arithmetic number, because the mean of its divisors is an integer number (30276769800).

Almost surely, 2^{1672354779571} is an apocalyptic number.

1672354779571 is a deficient number, since it is larger than the sum of its proper divisors (507572646029).

1672354779571 is a wasteful number, since it uses less digits than its factorization.

1672354779571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13217 (or 13193 counting only the distinct ones).

The product of its digits is 77792400, while the sum is 64.

The spelling of 1672354779571 in words is "one trillion, six hundred seventy-two billion, three hundred fifty-four million, seven hundred seventy-nine thousand, five hundred seventy-one".