3451571615721 has 8 divisors (see below), whose sum is σ = 4602120383200. Its totient is φ = 2301035296032.

The previous prime is 3451571615717. The next prime is 3451571615761. The reversal of 3451571615721 is 1275161751543.

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

It is not a de Polignac number, because 3451571615721 - 2² = 3451571615717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3451571615711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2444500 + ... + 3588693.

It is an arithmetic number, because the mean of its divisors is an integer number (575265047900).

Almost surely, 2^{3451571615721} is an apocalyptic number.

It is an amenable number.

3451571615721 is a deficient number, since it is larger than the sum of its proper divisors (1150548767479).

3451571615721 is a wasteful number, since it uses less digits than its factorization.

3451571615721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6223895.

The product of its digits is 882000, while the sum is 48.

The spelling of 3451571615721 in words is "three trillion, four hundred fifty-one billion, five hundred seventy-one million, six hundred fifteen thousand, seven hundred twenty-one".