649919454 has 16 divisors (see below), whose sum is σ = 1331542800. Its totient is φ = 211355840.

The previous prime is 649919449. The next prime is 649919477. The reversal of 649919454 is 454919946.

It is a junction number, because it is equal to n+sod(n) for n = 649919397 and 649919406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320729 + ... + 1321220.

It is an arithmetic number, because the mean of its divisors is an integer number (83221425).

Almost surely, 2^649919454 is an apocalyptic number.

649919454 is an abundant number, since it is smaller than the sum of its proper divisors (681623346).

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

649919454 is a wasteful number, since it uses less digits than its factorization.

649919454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641995.

The product of its digits is 1399680, while the sum is 51.

The square root of 649919454 is about 25493.5178820029. The cubic root of 649919454 is about 866.2033233013.

The spelling of 649919454 in words is "six hundred forty-nine million, nine hundred nineteen thousand, four hundred fifty-four".