1620063640431 has 32 divisors (see below), whose sum is σ = 2446571571200. Its totient is φ = 1059308733600.

The previous prime is 1620063640411. The next prime is 1620063640441. The reversal of 1620063640431 is 1340463600261.

1620063640431 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 0 + 6 + 3 + 640 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 1620063640431 - 2⁹ = 1620063639919 is a prime.

It is a super-2 number, since 2×1620063640431² (a number of 25 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 (1620063640411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2192896 + ... + 2837061.

It is an arithmetic number, because the mean of its divisors is an integer number (76455361600).

Almost surely, 2^{1620063640431} is an apocalyptic number.

1620063640431 is a deficient number, since it is larger than the sum of its proper divisors (826507930769).

1620063640431 is a wasteful number, since it uses less digits than its factorization.

1620063640431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030196 (or 5030190 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 1620063640431 in words is "one trillion, six hundred twenty billion, sixty-three million, six hundred forty thousand, four hundred thirty-one".