64127949 has 16 divisors (see below), whose sum is σ = 86592000. Its totient is φ = 42212016.

The previous prime is 64127929. The next prime is 64127951. The reversal of 64127949 is 94972146.

It is not a de Polignac number, because 64127949 - 2⁷ = 64127821 is a prime.

It is a super-2 number, since 2×64127949² = 8224787685893202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64127949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64127909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96982 + ... + 97640.

It is an arithmetic number, because the mean of its divisors is an integer number (5412000).

Almost surely, 2^64127949 is an apocalyptic number.

It is an amenable number.

64127949 is a deficient number, since it is larger than the sum of its proper divisors (22464051).

64127949 is a wasteful number, since it uses less digits than its factorization.

64127949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024.

The product of its digits is 108864, while the sum is 42.

The square root of 64127949 is about 8007.9928196771. The cubic root of 64127949 is about 400.2663829776.

The spelling of 64127949 in words is "sixty-four million, one hundred twenty-seven thousand, nine hundred forty-nine".