1620211263 has 32 divisors (see below), whose sum is σ = 2500362240. Its totient is φ = 922894560.

The previous prime is 1620211253. The next prime is 1620211291. The reversal of 1620211263 is 3621120261.

1620211263 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1620211263 - 2⁶ = 1620211199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620211223) 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, 69456 + ... + 89802.

It is an arithmetic number, because the mean of its divisors is an integer number (78136320).

Almost surely, 2^1620211263 is an apocalyptic number.

1620211263 is a deficient number, since it is larger than the sum of its proper divisors (880150977).

1620211263 is a wasteful number, since it uses less digits than its factorization.

1620211263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20507.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1620211263 is about 40251.8479451565. The cubic root of 1620211263 is about 1174.5113436305.

The spelling of 1620211263 in words is "one billion, six hundred twenty million, two hundred eleven thousand, two hundred sixty-three".