36639469440 has 384 divisors, whose sum is σ = 146975325120. Its totient is φ = 8236892160.

The previous prime is 36639469429. The next prime is 36639469457. The reversal of 36639469440 is 4496493663.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2452072 + ... + 2466968.

Almost surely, 2^36639469440 is an apocalyptic number.

36639469440 is a gapful number since it is divisible by the number (30) 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 36639469440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73487662560).

36639469440 is an abundant number, since it is smaller than the sum of its proper divisors (110335855680).

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

36639469440 is a wasteful number, since it uses less digits than its factorization.

36639469440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14990 (or 14975 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 54.

The spelling of 36639469440 in words is "thirty-six billion, six hundred thirty-nine million, four hundred sixty-nine thousand, four hundred forty".