47907166691 has 4 divisors (see below), whose sum is σ = 47907826512. Its totient is φ = 47906506872.

The previous prime is 47907166679. The next prime is 47907166871. The reversal of 47907166691 is 19666170974.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19666170974 = 2 ⋅9833085487.

It is a cyclic number.

It is not a de Polignac number, because 47907166691 - 2¹⁴ = 47907150307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47907166091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205316 + ... + 371441.

It is an arithmetic number, because the mean of its divisors is an integer number (11976956628).

Almost surely, 2^47907166691 is an apocalyptic number.

47907166691 is a deficient number, since it is larger than the sum of its proper divisors (659821).

47907166691 is an equidigital number, since it uses as much as digits as its factorization.

47907166691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659820.

The product of its (nonzero) digits is 3429216, while the sum is 56.

The spelling of 47907166691 in words is "forty-seven billion, nine hundred seven million, one hundred sixty-six thousand, six hundred ninety-one".