621692695742040 has 96 divisors (see below), whose sum is σ = 2175924435113520. Its totient is φ = 153032048181504.

The previous prime is 621692695742029. The next prime is 621692695742077. The reversal of 621692695742040 is 40247596296126.

621692695742040 is a `hidden beast` number, since 6 + 2 + 1 + 69 + 2 + 69 + 57 + 420 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66420155122 + ... + 66420164481.

Almost surely, 2^{621692695742040} is an apocalyptic number.

621692695742040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

621692695742040 is an abundant number, since it is smaller than the sum of its proper divisors (1554231739371480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621692695742040 is a wasteful number, since it uses less digits than its factorization.

621692695742040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132840319633 (or 132840319626 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 63.

The spelling of 621692695742040 in words is "six hundred twenty-one trillion, six hundred ninety-two billion, six hundred ninety-five million, seven hundred forty-two thousand, forty".