649755578293248 has 132 divisors (see below), whose sum is σ = 2014584160747272. Its totient is φ = 185644450897920.

The previous prime is 649755578293219. The next prime is 649755578293271. The reversal of 649755578293248 is 842392875557946.

It is a Harshad number since it is a multiple of its sum of digits (84).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2158104343 + ... + 2158405398.

Almost surely, 2^{649755578293248} is an apocalyptic number.

It is an amenable number.

649755578293248 is an abundant number, since it is smaller than the sum of its proper divisors (1364828582454024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649755578293248 is a wasteful number, since it uses less digits than its factorization.

649755578293248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4316509778 (or 4316509753 counting only the distinct ones).

The product of its digits is 36578304000, while the sum is 84.

The spelling of 649755578293248 in words is "six hundred forty-nine trillion, seven hundred fifty-five billion, five hundred seventy-eight million, two hundred ninety-three thousand, two hundred forty-eight".