621846145 has 32 divisors (see below), whose sum is σ = 804384000. Its totient is φ = 459841536.

The previous prime is 621846133. The next prime is 621846157. The reversal of 621846145 is 541648126.

It is an interprime number because it is at equal distance from previous prime (621846133) and next prime (621846157).

It is a cyclic number.

It is not a de Polignac number, because 621846145 - 2²⁵ = 588291713 is a prime.

It is a super-2 number, since 2×621846145² = 773385256102722050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1640566 + ... + 1640944.

It is an arithmetic number, because the mean of its divisors is an integer number (25137000).

Almost surely, 2^621846145 is an apocalyptic number.

It is an amenable number.

621846145 is a deficient number, since it is larger than the sum of its proper divisors (182537855).

621846145 is a wasteful number, since it uses less digits than its factorization.

621846145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697.

The product of its digits is 46080, while the sum is 37.

The square root of 621846145 is about 24936.8431241807. The cubic root of 621846145 is about 853.5474098553.

The spelling of 621846145 in words is "six hundred twenty-one million, eight hundred forty-six thousand, one hundred forty-five".