649861351 has 8 divisors (see below), whose sum is σ = 686009520. Its totient is φ = 613907712.

The previous prime is 649861309. The next prime is 649861391. The reversal of 649861351 is 153168946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 649861351 - 2⁹ = 649860839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649861298 and 649861307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649861391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41740 + ... + 55153.

It is an arithmetic number, because the mean of its divisors is an integer number (85751190).

Almost surely, 2^649861351 is an apocalyptic number.

649861351 is a deficient number, since it is larger than the sum of its proper divisors (36148169).

649861351 is a wasteful number, since it uses less digits than its factorization.

649861351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97265.

The product of its digits is 155520, while the sum is 43.

The square root of 649861351 is about 25492.3782923446. The cubic root of 649861351 is about 866.1775095838.

The spelling of 649861351 in words is "six hundred forty-nine million, eight hundred sixty-one thousand, three hundred fifty-one".