3891720752274 has 16 divisors (see below), whose sum is σ = 7786630162080. Its totient is φ = 1296708807840.

The previous prime is 3891720752273. The next prime is 3891720752281. The reversal of 3891720752274 is 4722570271983.

It is not an unprimeable number, because it can be changed into a prime (3891720752273) 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, 132844864 + ... + 132874155.

It is an arithmetic number, because the mean of its divisors is an integer number (486664385130).

Almost surely, 2^{3891720752274} is an apocalyptic number.

3891720752274 is an abundant number, since it is smaller than the sum of its proper divisors (3894909409806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3891720752274 is a wasteful number, since it uses less digits than its factorization.

3891720752274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265721465.

The product of its (nonzero) digits is 11854080, while the sum is 57.

The spelling of 3891720752274 in words is "three trillion, eight hundred ninety-one billion, seven hundred twenty million, seven hundred fifty-two thousand, two hundred seventy-four".