1621363560 has 32 divisors (see below), whose sum is σ = 4864091040. Its totient is φ = 432363584.

The previous prime is 1621363553. The next prime is 1621363567. The reversal of 1621363560 is 653631261.

It is an interprime number because it is at equal distance from previous prime (1621363553) and next prime (1621363567).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1621363567) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6755562 + ... + 6755801.

It is an arithmetic number, because the mean of its divisors is an integer number (152002845).

Almost surely, 2^1621363560 is an apocalyptic number.

1621363560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1621363560 is an abundant number, since it is smaller than the sum of its proper divisors (3242727480).

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

1621363560 is a wasteful number, since it uses less digits than its factorization.

1621363560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13511377 (or 13511373 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 1621363560 is about 40266.1589923847. The cubic root of 1621363560 is about 1174.7897158016.

The spelling of 1621363560 in words is "one billion, six hundred twenty-one million, three hundred sixty-three thousand, five hundred sixty".