36648991890 has 480 divisors, whose sum is σ = 125973429120. Its totient is φ = 7587385344.

The previous prime is 36648991879. The next prime is 36648991927. The reversal of 36648991890 is 9819984663.

It is a happy number.

36648991890 is a `hidden beast` number, since 3 + 66 + 489 + 9 + 1 + 8 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 17343474 + ... + 17345586.

It is an arithmetic number, because the mean of its divisors is an integer number (262444644).

Almost surely, 2^36648991890 is an apocalyptic number.

36648991890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 36648991890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62986714560).

36648991890 is an abundant number, since it is smaller than the sum of its proper divisors (89324437230).

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

36648991890 is a wasteful number, since it uses less digits than its factorization.

36648991890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The spelling of 36648991890 in words is "thirty-six billion, six hundred forty-eight million, nine hundred ninety-one thousand, eight hundred ninety".