1621141753 has 32 divisors (see below), whose sum is σ = 2074862592. Its totient is φ = 1229860800.

The previous prime is 1621141741. The next prime is 1621141757. The reversal of 1621141753 is 3571411261.

It is not a de Polignac number, because 1621141753 - 2⁵ = 1621141721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1621141757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1393350 + ... + 1394512.

It is an arithmetic number, because the mean of its divisors is an integer number (64839456).

Almost surely, 2^1621141753 is an apocalyptic number.

It is an amenable number.

1621141753 is a deficient number, since it is larger than the sum of its proper divisors (453720839).

1621141753 is a wasteful number, since it uses less digits than its factorization.

1621141753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645.

The product of its digits is 5040, while the sum is 31.

The square root of 1621141753 is about 40263.4046374620. The cubic root of 1621141753 is about 1174.7361418691.

The spelling of 1621141753 in words is "one billion, six hundred twenty-one million, one hundred forty-one thousand, seven hundred fifty-three".