721275572127 has 128 divisors (see below), whose sum is σ = 1159035816960. Its totient is φ = 394048512000.

The previous prime is 721275572119. The next prime is 721275572131.

721275572127 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 721275572127 - 2³ = 721275572119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721275572527) 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, 252104677 + ... + 252107537.

It is an arithmetic number, because the mean of its divisors is an integer number (9054967320).

Almost surely, 2^721275572127 is an apocalyptic number.

721275572127 is a deficient number, since it is larger than the sum of its proper divisors (437760244833).

721275572127 is a wasteful number, since it uses less digits than its factorization.

721275572127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145.

The product of its digits is 960400, while the sum is 48.

The spelling of 721275572127 in words is "seven hundred twenty-one billion, two hundred seventy-five million, five hundred seventy-two thousand, one hundred twenty-seven".