37778538816 has 168 divisors, whose sum is σ = 112493803968. Its totient is φ = 12112128000.

The previous prime is 37778538799. The next prime is 37778538823. The reversal of 37778538816 is 61883587773.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1665471 + ... + 1688001.

It is an arithmetic number, because the mean of its divisors is an integer number (669605976).

Almost surely, 2^37778538816 is an apocalyptic number.

37778538816 is a gapful number since it is divisible by the number (36) 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 37778538816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56246901984).

37778538816 is an abundant number, since it is smaller than the sum of its proper divisors (74715265152).

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

37778538816 is a wasteful number, since it uses less digits than its factorization.

37778538816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22661 (or 22648 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 63.

The spelling of 37778538816 in words is "thirty-seven billion, seven hundred seventy-eight million, five hundred thirty-eight thousand, eight hundred sixteen".