391442145146 has 32 divisors (see below), whose sum is σ = 698635300608. Its totient is φ = 162645246720.

The previous prime is 391442145071. The next prime is 391442145151. The reversal of 391442145146 is 641541244193.

It is a super-2 number, since 2×391442145146² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 391442145097 and 391442145106.

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, 19242350 + ... + 19262681.

It is an arithmetic number, because the mean of its divisors is an integer number (21832353144).

Almost surely, 2^391442145146 is an apocalyptic number.

391442145146 is a deficient number, since it is larger than the sum of its proper divisors (307193155462).

391442145146 is a wasteful number, since it uses less digits than its factorization.

391442145146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38505086.

The product of its digits is 414720, while the sum is 44.

The spelling of 391442145146 in words is "three hundred ninety-one billion, four hundred forty-two million, one hundred forty-five thousand, one hundred forty-six".