653640402452 has 6 divisors (see below), whose sum is σ = 1143870704298. Its totient is φ = 326820201224.

The previous prime is 653640402449. The next prime is 653640402461. The reversal of 653640402452 is 254204046356.

It can be written as a sum of positive squares in only one way, i.e., 512890874896 + 140749527556 = 716164^2 + 375166^2 .

It is a super-2 number, since 2×653640402452² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81705050303 + ... + 81705050310.

It is an arithmetic number, because the mean of its divisors is an integer number (190645117383).

Almost surely, 2^653640402452 is an apocalyptic number.

It is an amenable number.

653640402452 is a deficient number, since it is larger than the sum of its proper divisors (490230301846).

653640402452 is a wasteful number, since it uses less digits than its factorization.

653640402452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163410100617 (or 163410100615 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 41.

The spelling of 653640402452 in words is "six hundred fifty-three billion, six hundred forty million, four hundred two thousand, four hundred fifty-two".