1675721664747 has 24 divisors (see below), whose sum is σ = 2703221785264. Its totient is φ = 1031213330208.

The previous prime is 1675721664737. The next prime is 1675721664769. The reversal of 1675721664747 is 7474661275761.

It is a happy number.

1675721664747 is a `hidden beast` number, since 1 + 6 + 7 + 572 + 16 + 6 + 4 + 7 + 47 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1675721664747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1675721664737) 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, 265226608 + ... + 265232925.

Almost surely, 2^{1675721664747} is an apocalyptic number.

1675721664747 is a deficient number, since it is larger than the sum of its proper divisors (1027500120517).

1675721664747 is an equidigital number, since it uses as much as digits as its factorization.

1675721664747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530459561 (or 530459549 counting only the distinct ones).

The product of its digits is 82978560, while the sum is 63.

The spelling of 1675721664747 in words is "one trillion, six hundred seventy-five billion, seven hundred twenty-one million, six hundred sixty-four thousand, seven hundred forty-seven".