146621146391 has 4 divisors (see below), whose sum is σ = 146622886032. Its totient is φ = 146619406752.

The previous prime is 146621146367. The next prime is 146621146409. The reversal of 146621146391 is 193641126641.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 146621146391 - 2²² = 146616952087 is a prime.

It is a super-2 number, since 2×146621146391² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146621146291) 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, 736595 + ... + 914228.

It is an arithmetic number, because the mean of its divisors is an integer number (36655721508).

Almost surely, 2^146621146391 is an apocalyptic number.

146621146391 is a deficient number, since it is larger than the sum of its proper divisors (1739641).

146621146391 is an equidigital number, since it uses as much as digits as its factorization.

146621146391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739640.

The product of its digits is 186624, while the sum is 44.

The spelling of 146621146391 in words is "one hundred forty-six billion, six hundred twenty-one million, one hundred forty-six thousand, three hundred ninety-one".