648157550 has 12 divisors (see below), whose sum is σ = 1205573136. Its totient is φ = 259263000.

The previous prime is 648157547. The next prime is 648157571. The reversal of 648157550 is 55751846.

It is a junction number, because it is equal to n+sod(n) for n = 648157498 and 648157507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6481526 + ... + 6481625.

It is an arithmetic number, because the mean of its divisors is an integer number (100464428).

Almost surely, 2^648157550 is an apocalyptic number.

648157550 is a deficient number, since it is larger than the sum of its proper divisors (557415586).

648157550 is a wasteful number, since it uses less digits than its factorization.

648157550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12963163 (or 12963158 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 41.

The square root of 648157550 is about 25458.9385089010. The cubic root of 648157550 is about 865.4198681125.

The spelling of 648157550 in words is "six hundred forty-eight million, one hundred fifty-seven thousand, five hundred fifty".