649358809742 has 16 divisors (see below), whose sum is σ = 994107047472. Its totient is φ = 318010667520.

The previous prime is 649358809699. The next prime is 649358809793. The reversal of 649358809742 is 247908853946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5155859 + ... + 5280302.

It is an arithmetic number, because the mean of its divisors is an integer number (62131690467).

Almost surely, 2^649358809742 is an apocalyptic number.

649358809742 is a deficient number, since it is larger than the sum of its proper divisors (344748237730).

649358809742 is a wasteful number, since it uses less digits than its factorization.

649358809742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10436803.

The product of its (nonzero) digits is 104509440, while the sum is 65.

The spelling of 649358809742 in words is "six hundred forty-nine billion, three hundred fifty-eight million, eight hundred nine thousand, seven hundred forty-two".