64469961 has 12 divisors (see below), whose sum is σ = 93994992. Its totient is φ = 42577656.

The previous prime is 64469959. The next prime is 64469981. The reversal of 64469961 is 16996446.

It is not a de Polignac number, because 64469961 - 2¹ = 64469959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64469921) 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, 32511 + ... + 34436.

It is an arithmetic number, because the mean of its divisors is an integer number (7832916).

Almost surely, 2^64469961 is an apocalyptic number.

It is an amenable number.

64469961 is a deficient number, since it is larger than the sum of its proper divisors (29525031).

64469961 is a wasteful number, since it uses less digits than its factorization.

64469961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67060 (or 67057 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 64469961 is about 8029.3188378592. The cubic root of 64469961 is about 400.9766986251.

The spelling of 64469961 in words is "sixty-four million, four hundred sixty-nine thousand, nine hundred sixty-one".