1620651053 has 8 divisors (see below), whose sum is σ = 1855563072. Its totient is φ = 1386586656.

The previous prime is 1620651031. The next prime is 1620651061. The reversal of 1620651053 is 3501560261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1620651053 - 2⁸ = 1620650797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620651073) 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 7 ways as a sum of consecutive naturals, for example, 207800 + ... + 215457.

It is an arithmetic number, because the mean of its divisors is an integer number (231945384).

Almost surely, 2^1620651053 is an apocalyptic number.

It is an amenable number.

1620651053 is a deficient number, since it is larger than the sum of its proper divisors (234912019).

1620651053 is an equidigital number, since it uses as much as digits as its factorization.

1620651053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423811.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1620651053 is about 40257.3105534883. The cubic root of 1620651053 is about 1174.6176037679.

The spelling of 1620651053 in words is "one billion, six hundred twenty million, six hundred fifty-one thousand, fifty-three".