5521620653 has 4 divisors (see below), whose sum is σ = 5523221340. Its totient is φ = 5520019968.

The previous prime is 5521620623. The next prime is 5521620659. The reversal of 5521620653 is 3560261255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3560261255 = 5 ⋅712052251.

It can be written as a sum of positive squares in 2 ways, for example, as 34070569 + 5487550084 = 5837^2 + 74078^2 .

It is a cyclic number.

It is not a de Polignac number, because 5521620653 - 2⁶ = 5521620589 is a prime.

It is a super-2 number, since 2×5521620653² = 60976589271272292818, 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 (5521620659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795158 + ... + 802071.

It is an arithmetic number, because the mean of its divisors is an integer number (1380805335).

Almost surely, 2^5521620653 is an apocalyptic number.

It is an amenable number.

5521620653 is a deficient number, since it is larger than the sum of its proper divisors (1600687).

5521620653 is a wasteful number, since it uses less digits than its factorization.

5521620653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600686.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 5521620653 is about 74307.6083116662. The cubic root of 5521620653 is about 1767.4841263837.

The spelling of 5521620653 in words is "five billion, five hundred twenty-one million, six hundred twenty thousand, six hundred fifty-three".