64619464 has 64 divisors (see below), whose sum is σ = 153216000. Its totient is φ = 24862464.

The previous prime is 64619461. The next prime is 64619507. The reversal of 64619464 is 46491646.

It is not an unprimeable number, because it can be changed into a prime (64619461) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25737 + ... + 28135.

It is an arithmetic number, because the mean of its divisors is an integer number (2394000).

Almost surely, 2^64619464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64619464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76608000).

64619464 is an abundant number, since it is smaller than the sum of its proper divisors (88596536).

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

64619464 is a wasteful number, since it uses less digits than its factorization.

64619464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2462 (or 2458 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 64619464 is about 8038.6232652115. The cubic root of 64619464 is about 401.2864084482.

The spelling of 64619464 in words is "sixty-four million, six hundred nineteen thousand, four hundred sixty-four".