3915271666405 has 16 divisors (see below), whose sum is σ = 5172468998400. Its totient is φ = 2821346717760.

The previous prime is 3915271666349. The next prime is 3915271666417. The reversal of 3915271666405 is 5046661725193.

It is a happy number.

It is not a de Polignac number, because 3915271666405 - 2¹⁷ = 3915271535333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326538765 + ... + 326550754.

It is an arithmetic number, because the mean of its divisors is an integer number (323279312400).

Almost surely, 2^{3915271666405} is an apocalyptic number.

It is an amenable number.

3915271666405 is a deficient number, since it is larger than the sum of its proper divisors (1257197331995).

3915271666405 is a wasteful number, since it uses less digits than its factorization.

3915271666405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653089644.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 3915271666405 in words is "three trillion, nine hundred fifteen billion, two hundred seventy-one million, six hundred sixty-six thousand, four hundred five".