649980501 has 8 divisors (see below), whose sum is σ = 868047744. Its totient is φ = 432616800.

The previous prime is 649980497. The next prime is 649980511. The reversal of 649980501 is 105089946.

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

It is not a de Polignac number, because 649980501 - 2² = 649980497 is a prime.

It is a super-2 number, since 2×649980501² = 844949303360422002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649980511) 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, 173725 + ... + 177426.

It is an arithmetic number, because the mean of its divisors is an integer number (108505968).

Almost surely, 2^649980501 is an apocalyptic number.

It is an amenable number.

649980501 is a deficient number, since it is larger than the sum of its proper divisors (218067243).

649980501 is a wasteful number, since it uses less digits than its factorization.

649980501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351771.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 649980501 is about 25494.7151582441. The cubic root of 649980501 is about 866.2304433075.

The spelling of 649980501 in words is "six hundred forty-nine million, nine hundred eighty thousand, five hundred one".