649758090454 has 24 divisors (see below), whose sum is σ = 1071644079240. Its totient is φ = 295248449760.

The previous prime is 649758090419. The next prime is 649758090463. The reversal of 649758090454 is 454090857946.

It is a happy number.

It is a super-2 number, since 2×649758090454² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 649758090392 and 649758090401.

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 11 ways as a sum of consecutive naturals, for example, 310642 + ... + 1181530.

It is an arithmetic number, because the mean of its divisors is an integer number (44651836635).

Almost surely, 2^649758090454 is an apocalyptic number.

649758090454 is a deficient number, since it is larger than the sum of its proper divisors (421885988786).

649758090454 is a wasteful number, since it uses less digits than its factorization.

649758090454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873996 (or 873985 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 61.

The spelling of 649758090454 in words is "six hundred forty-nine billion, seven hundred fifty-eight million, ninety thousand, four hundred fifty-four".