780172730002721 has 8 divisors (see below), whose sum is σ = 874100159413824. Its totient is φ = 690079073220720.

The previous prime is 780172730002703. The next prime is 780172730002733. The reversal of 780172730002721 is 127200037271087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 780172730002721 - 2¹⁴ = 780172729986337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (780172730007721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958443156845 + ... + 958443157658.

It is an arithmetic number, because the mean of its divisors is an integer number (109262519926728).

Almost surely, 2^{780172730002721} is an apocalyptic number.

It is an amenable number.

780172730002721 is a deficient number, since it is larger than the sum of its proper divisors (93927429411103).

780172730002721 is a wasteful number, since it uses less digits than its factorization.

780172730002721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916886314551.

The product of its (nonzero) digits is 460992, while the sum is 47.

The spelling of 780172730002721 in words is "seven hundred eighty trillion, one hundred seventy-two billion, seven hundred thirty million, two thousand, seven hundred twenty-one".