49999664 has 90 divisors (see below), whose sum is σ = 117294948. Its totient is φ = 20467200.

The previous prime is 49999643. The next prime is 49999667. The reversal of 49999664 is 46699994.

It is a super-2 number, since 2×49999664² = 4999932800225792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49999667) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1219484 + ... + 1219524.

Almost surely, 2^49999664 is an apocalyptic number.

49999664 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49999664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58647474).

49999664 is an abundant number, since it is smaller than the sum of its proper divisors (67295284).

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

49999664 is a wasteful number, since it uses less digits than its factorization.

49999664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 67 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 56.

The square root of 49999664 is about 7071.0440530377. The cubic root of 49999664 is about 368.4023246391.

The spelling of 49999664 in words is "forty-nine million, nine hundred ninety-nine thousand, six hundred sixty-four".