654213520061 has 4 divisors (see below), whose sum is σ = 654252615324. Its totient is φ = 654174424800.

The previous prime is 654213520031. The next prime is 654213520067. The reversal of 654213520061 is 160025312456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 607766804836 + 46446715225 = 779594^2 + 215515^2 .

It is a cyclic number.

It is not a de Polignac number, because 654213520061 - 2¹⁴ = 654213503677 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 (654213520067) 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, 19522520 + ... + 19556001.

It is an arithmetic number, because the mean of its divisors is an integer number (163563153831).

Almost surely, 2^654213520061 is an apocalyptic number.

It is an amenable number.

654213520061 is a deficient number, since it is larger than the sum of its proper divisors (39095263).

654213520061 is a wasteful number, since it uses less digits than its factorization.

654213520061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39095262.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 654213520061 in words is "six hundred fifty-four billion, two hundred thirteen million, five hundred twenty thousand, sixty-one".