650437680 has 80 divisors (see below), whose sum is σ = 2134979424. Its totient is φ = 163246080.

The previous prime is 650437657. The next prime is 650437681. The reversal of 650437680 is 86734056.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (650437681) 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, 75631 + ... + 83790.

Almost surely, 2^650437680 is an apocalyptic number.

650437680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

650437680 is an abundant number, since it is smaller than the sum of its proper divisors (1484541744).

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

650437680 is a wasteful number, since it uses less digits than its factorization.

650437680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159454 (or 159448 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 650437680 is about 25503.6797345011. The cubic root of 650437680 is about 866.4334901953.

The spelling of 650437680 in words is "six hundred fifty million, four hundred thirty-seven thousand, six hundred eighty".