36221937858 has 90 divisors (see below), whose sum is σ = 85769573571. Its totient is φ = 11423972376.

The previous prime is 36221937853. The next prime is 36221937881. The reversal of 36221937858 is 85873912263.

36221937858 is a `hidden beast` number, since 3 + 6 + 2 + 219 + 378 + 58 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18110968929 + 18110968929 = 134577^2 + 134577^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=134577.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (36221937853) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 46024941 + ... + 46025727.

Almost surely, 2^36221937858 is an apocalyptic number.

36221937858 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 36221937858

36221937858 is an abundant number, since it is smaller than the sum of its proper divisors (49547635713).

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

36221937858 is an frugal number, since it uses more digits than its factorization.

36221937858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 811 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 36221937858 in words is "thirty-six billion, two hundred twenty-one million, nine hundred thirty-seven thousand, eight hundred fifty-eight".