37818633618 has 128 divisors (see below), whose sum is σ = 87369891840. Its totient is φ = 12117479040.

The previous prime is 37818633583. The next prime is 37818633623. The reversal of 37818633618 is 81633681873.

37818633618 is a `hidden beast` number, since 3 + 7 + 8 + 18 + 6 + 3 + 3 + 618 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62303871 + ... + 62304477.

It is an arithmetic number, because the mean of its divisors is an integer number (682577280).

Almost surely, 2^37818633618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 37818633618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43684945920).

37818633618 is an abundant number, since it is smaller than the sum of its proper divisors (49551258222).

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

37818633618 is a wasteful number, since it uses less digits than its factorization.

37818633618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029 (or 1023 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 37818633618 in words is "thirty-seven billion, eight hundred eighteen million, six hundred thirty-three thousand, six hundred eighteen".