391418948847 has 16 divisors (see below), whose sum is σ = 526673452032. Its totient is φ = 258565066080.

The previous prime is 391418948831. The next prime is 391418948863. The reversal of 391418948847 is 748849814193.

It is an interprime number because it is at equal distance from previous prime (391418948831) and next prime (391418948863).

It is not a de Polignac number, because 391418948847 - 2⁴ = 391418948831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391418941847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1073479 + ... + 1391112.

It is an arithmetic number, because the mean of its divisors is an integer number (32917090752).

Almost surely, 2^391418948847 is an apocalyptic number.

391418948847 is a deficient number, since it is larger than the sum of its proper divisors (135254503185).

391418948847 is a wasteful number, since it uses less digits than its factorization.

391418948847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465078.

The product of its digits is 55738368, while the sum is 66.

The spelling of 391418948847 in words is "three hundred ninety-one billion, four hundred eighteen million, nine hundred forty-eight thousand, eight hundred forty-seven".