649427405583 has 32 divisors (see below), whose sum is σ = 947041235712. Its totient is φ = 392585356800.

The previous prime is 649427405569. The next prime is 649427405597. The reversal of 649427405583 is 385504724946.

It is an interprime number because it is at equal distance from previous prime (649427405569) and next prime (649427405597).

It is not a de Polignac number, because 649427405583 - 2¹³ = 649427397391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649427405503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24426085 + ... + 24452657.

It is an arithmetic number, because the mean of its divisors is an integer number (29595038616).

Almost surely, 2^649427405583 is an apocalyptic number.

649427405583 is a deficient number, since it is larger than the sum of its proper divisors (297613830129).

649427405583 is a wasteful number, since it uses less digits than its factorization.

649427405583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28455.

The product of its (nonzero) digits is 29030400, while the sum is 57.

The spelling of 649427405583 in words is "six hundred forty-nine billion, four hundred twenty-seven million, four hundred five thousand, five hundred eighty-three".