4540721953 has 2 divisors, whose sum is σ = 4540721954. Its totient is φ = 4540721952.

The previous prime is 4540721909. The next prime is 4540721957. The reversal of 4540721953 is 3591270454.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4518931729 + 21790224 = 67223^2 + 4668^2 .

It is a cyclic number.

It is not a de Polignac number, because 4540721953 - 2²¹ = 4538624801 is a prime.

It is a super-2 number, since 2×4540721953² = 41236311708912268418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4540721957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2270360976 + 2270360977.

It is an arithmetic number, because the mean of its divisors is an integer number (2270360977).

Almost surely, 2^4540721953 is an apocalyptic number.

It is an amenable number.

4540721953 is a deficient number, since it is larger than the sum of its proper divisors (1).

4540721953 is an equidigital number, since it uses as much as digits as its factorization.

4540721953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 4540721953 is about 67384.8792608550. The cubic root of 4540721953 is about 1655.9287118419.

The spelling of 4540721953 in words is "four billion, five hundred forty million, seven hundred twenty-one thousand, nine hundred fifty-three".