645070053 has 16 divisors (see below), whose sum is σ = 865650240. Its totient is φ = 427277184.

The previous prime is 645070043. The next prime is 645070061. The reversal of 645070053 is 350070546.

It is not a de Polignac number, because 645070053 - 2⁸ = 645069797 is a prime.

It is a super-2 number, since 2×645070053² = 832230746554845618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 645070053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645070033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511738 + ... + 512996.

It is an arithmetic number, because the mean of its divisors is an integer number (54103140).

Almost surely, 2^645070053 is an apocalyptic number.

It is an amenable number.

645070053 is a deficient number, since it is larger than the sum of its proper divisors (220580187).

645070053 is a wasteful number, since it uses less digits than its factorization.

645070053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 645070053 is about 25398.2293280457. The cubic root of 645070053 is about 864.0435385617.

The spelling of 645070053 in words is "six hundred forty-five million, seventy thousand, fifty-three".