649820809142 has 8 divisors (see below), whose sum is σ = 1026032856600. Its totient is φ = 307809856944.

The previous prime is 649820809139. The next prime is 649820809151. The reversal of 649820809142 is 241908028946.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8550273767 + ... + 8550273842.

It is an arithmetic number, because the mean of its divisors is an integer number (128254107075).

Almost surely, 2^649820809142 is an apocalyptic number.

649820809142 is a deficient number, since it is larger than the sum of its proper divisors (376212047458).

649820809142 is a wasteful number, since it uses less digits than its factorization.

649820809142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17100547630.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 649820809142 in words is "six hundred forty-nine billion, eight hundred twenty million, eight hundred nine thousand, one hundred forty-two".