649797456 has 80 divisors (see below), whose sum is σ = 2092866048. Its totient is φ = 168777600.

The previous prime is 649797451. The next prime is 649797481. The reversal of 649797456 is 654797946.

It is a junction number, because it is equal to n+sod(n) for n = 649797396 and 649797405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649797451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84210 + ... + 91601.

Almost surely, 2^649797456 is an apocalyptic number.

649797456 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

649797456 is an abundant number, since it is smaller than the sum of its proper divisors (1443068592).

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

649797456 is a wasteful number, since it uses less digits than its factorization.

649797456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175840 (or 175834 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 57.

The square root of 649797456 is about 25491.1250438265. The cubic root of 649797456 is about 866.1491208484.

The spelling of 649797456 in words is "six hundred forty-nine million, seven hundred ninety-seven thousand, four hundred fifty-six".