649378602611 has 8 divisors (see below), whose sum is σ = 663245704704. Its totient is φ = 635513606280.

The previous prime is 649378602589. The next prime is 649378602619. The reversal of 649378602611 is 116206873946.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649378602611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649378602619) 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, 104906 + ... + 1144448.

It is an arithmetic number, because the mean of its divisors is an integer number (82905713088).

Almost surely, 2^649378602611 is an apocalyptic number.

649378602611 is a deficient number, since it is larger than the sum of its proper divisors (13867102093).

649378602611 is a wasteful number, since it uses less digits than its factorization.

649378602611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052881.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 649378602611 in words is "six hundred forty-nine billion, three hundred seventy-eight million, six hundred two thousand, six hundred eleven".