653388451049 has 4 divisors (see below), whose sum is σ = 653774388036. Its totient is φ = 653002514064.

The previous prime is 653388450997. The next prime is 653388451087. The reversal of 653388451049 is 940154883356.

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 466172141824 + 187216309225 = 682768^2 + 432685^2 .

It is a cyclic number.

It is not a de Polignac number, because 653388451049 - 2²⁴ = 653371673833 is a prime.

It is a super-2 number, since 2×653388451049² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 653388450985 and 653388451003.

It is not an unprimeable number, because it can be changed into a prime (653388457049) 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, 192965954 + ... + 192969339.

It is an arithmetic number, because the mean of its divisors is an integer number (163443597009).

Almost surely, 2^653388451049 is an apocalyptic number.

It is an amenable number.

653388451049 is a deficient number, since it is larger than the sum of its proper divisors (385936987).

653388451049 is a wasteful number, since it uses less digits than its factorization.

653388451049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385936986.

The product of its (nonzero) digits is 12441600, while the sum is 56.

The spelling of 653388451049 in words is "six hundred fifty-three billion, three hundred eighty-eight million, four hundred fifty-one thousand, forty-nine".