653640145726 has 8 divisors (see below), whose sum is σ = 981297506664. Its totient is φ = 326540976840.

The previous prime is 653640145709. The next prime is 653640145771. The reversal of 653640145726 is 627541046356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 653640145726.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139545085 + ... + 139549768.

It is an arithmetic number, because the mean of its divisors is an integer number (122662188333).

Almost surely, 2^653640145726 is an apocalyptic number.

653640145726 is a deficient number, since it is larger than the sum of its proper divisors (327657360938).

653640145726 is a wasteful number, since it uses less digits than its factorization.

653640145726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279096026.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 653640145726 in words is "six hundred fifty-three billion, six hundred forty million, one hundred forty-five thousand, seven hundred twenty-six".