3767428692721 has 8 divisors (see below), whose sum is σ = 3991661373024. Its totient is φ = 3543487037760.

The previous prime is 3767428692719. The next prime is 3767428692779. The reversal of 3767428692721 is 1272968247673.

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 3767428692721 - 2¹ = 3767428692719 is a prime.

It is a super-3 number, since 3×3767428692721³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3767428692221) 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, 72729675 + ... + 72781456.

It is an arithmetic number, because the mean of its divisors is an integer number (498957671628).

Almost surely, 2^{3767428692721} is an apocalyptic number.

It is an amenable number.

3767428692721 is a deficient number, since it is larger than the sum of its proper divisors (224232680303).

3767428692721 is a wasteful number, since it uses less digits than its factorization.

3767428692721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145512671.

The product of its digits is 85349376, while the sum is 64.

The spelling of 3767428692721 in words is "three trillion, seven hundred sixty-seven billion, four hundred twenty-eight million, six hundred ninety-two thousand, seven hundred twenty-one".