649455487842 has 32 divisors (see below), whose sum is σ = 1484936659584. Its totient is φ = 185500339200.

The previous prime is 649455487819. The next prime is 649455487907. The reversal of 649455487842 is 248784554946.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2296959 + ... + 2564162.

It is an arithmetic number, because the mean of its divisors is an integer number (46404270612).

Almost surely, 2^649455487842 is an apocalyptic number.

649455487842 is an abundant number, since it is smaller than the sum of its proper divisors (835481171742).

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

649455487842 is a wasteful number, since it uses less digits than its factorization.

649455487842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4864314.

The product of its digits is 309657600, while the sum is 66.

The spelling of 649455487842 in words is "six hundred forty-nine billion, four hundred fifty-five million, four hundred eighty-seven thousand, eight hundred forty-two".