648161019 has 12 divisors (see below), whose sum is σ = 1021344792. Its totient is φ = 392824800.

The previous prime is 648161011. The next prime is 648161021. The reversal of 648161019 is 910161846.

It is a happy number.

648161019 is a `hidden beast` number, since 648 + 1 + 6 + 1 + 0 + 1 + 9 = 666.

It is not a de Polignac number, because 648161019 - 2³ = 648161011 is a prime.

It is a super-2 number, since 2×648161019² = 840225413102236722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (648161011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3273442 + ... + 3273639.

It is an arithmetic number, because the mean of its divisors is an integer number (85112066).

Almost surely, 2^648161019 is an apocalyptic number.

648161019 is a deficient number, since it is larger than the sum of its proper divisors (373183773).

648161019 is a wasteful number, since it uses less digits than its factorization.

648161019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6547098 (or 6547095 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 648161019 is about 25459.0066381232. The cubic root of 648161019 is about 865.4214120458.

The spelling of 648161019 in words is "six hundred forty-eight million, one hundred sixty-one thousand, nineteen".