1620469631 has 12 divisors (see below), whose sum is σ = 1885954896. Its totient is φ = 1386496320.

The previous prime is 1620469621. The next prime is 1620469693. The reversal of 1620469631 is 1369640261.

It is not a de Polignac number, because 1620469631 - 2¹⁸ = 1620207487 is a prime.

It is a super-2 number, since 2×1620469631² = 5251843649986552322, which 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 (1620469601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391835 + ... + 395948.

It is an arithmetic number, because the mean of its divisors is an integer number (157162908).

Almost surely, 2^1620469631 is an apocalyptic number.

1620469631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1620469631 is a deficient number, since it is larger than the sum of its proper divisors (265485265).

1620469631 is a wasteful number, since it uses less digits than its factorization.

1620469631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787822 (or 787811 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 1620469631 is about 40255.0572102438. The cubic root of 1620469631 is about 1174.5737717069.

The spelling of 1620469631 in words is "one billion, six hundred twenty million, four hundred sixty-nine thousand, six hundred thirty-one".