64782161490 has 16 divisors (see below), whose sum is σ = 155477187648. Its totient is φ = 17275243056.

The previous prime is 64782161489. The next prime is 64782161497. The reversal of 64782161490 is 9416128746.

It is not an unprimeable number, because it can be changed into a prime (64782161497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079702662 + ... + 1079702721.

It is an arithmetic number, because the mean of its divisors is an integer number (9717324228).

Almost surely, 2^64782161490 is an apocalyptic number.

64782161490 is an abundant number, since it is smaller than the sum of its proper divisors (90695026158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64782161490 is a wasteful number, since it uses less digits than its factorization.

64782161490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159405393.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 64782161490 in words is "sixty-four billion, seven hundred eighty-two million, one hundred sixty-one thousand, four hundred ninety".