648152536 has 8 divisors (see below), whose sum is σ = 1215286020. Its totient is φ = 324076264.

The previous prime is 648152521. The next prime is 648152537. The reversal of 648152536 is 635251846.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648152537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40509526 + ... + 40509541.

Almost surely, 2^648152536 is an apocalyptic number.

It is an amenable number.

648152536 is a deficient number, since it is larger than the sum of its proper divisors (567133484).

648152536 is a wasteful number, since it uses less digits than its factorization.

648152536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81019073 (or 81019069 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 648152536 is about 25458.8400364196. The cubic root of 648152536 is about 865.4176365427.

The spelling of 648152536 in words is "six hundred forty-eight million, one hundred fifty-two thousand, five hundred thirty-six".