64990958 has 4 divisors (see below), whose sum is σ = 97486440. Its totient is φ = 32495478.

The previous prime is 64990957. The next prime is 64990993. The reversal of 64990958 is 85909946.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64990957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16247738 + ... + 16247741.

It is an arithmetic number, because the mean of its divisors is an integer number (24371610).

Almost surely, 2^64990958 is an apocalyptic number.

64990958 is a deficient number, since it is larger than the sum of its proper divisors (32495482).

64990958 is a wasteful number, since it uses less digits than its factorization.

64990958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32495481.

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 64990958 is about 8061.6969677606. The cubic root of 64990958 is about 402.0539311983.

The spelling of 64990958 in words is "sixty-four million, nine hundred ninety thousand, nine hundred fifty-eight".