64990144 has 14 divisors (see below), whose sum is σ = 128964944. Its totient is φ = 32495040.

The previous prime is 64990141. The next prime is 64990153. The reversal of 64990144 is 44109946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64990141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507672 + ... + 507799.

Almost surely, 2^64990144 is an apocalyptic number.

64990144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64990144 is a deficient number, since it is larger than the sum of its proper divisors (63974800).

64990144 is a wasteful number, since it uses less digits than its factorization.

64990144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015483 (or 1015473 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 64990144 is about 8061.6464819539. The cubic root of 64990144 is about 402.0522526403.

The spelling of 64990144 in words is "sixty-four million, nine hundred ninety thousand, one hundred forty-four".