37904858721 has 12 divisors (see below), whose sum is σ = 55366648740. Its totient is φ = 24985973760.

The previous prime is 37904858681. The next prime is 37904858753. The reversal of 37904858721 is 12785840973.

It is a happy number.

37904858721 is a `hidden beast` number, since 3 + 7 + 90 + 485 + 8 + 72 + 1 = 666.

37904858721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5811927696 + 32092931025 = 76236^2 + 179145^2 .

It is not a de Polignac number, because 37904858721 - 2¹⁴ = 37904842337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (37904858021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23660160 + ... + 23661761.

It is an arithmetic number, because the mean of its divisors is an integer number (4613887395).

Almost surely, 2^37904858721 is an apocalyptic number.

It is an amenable number.

37904858721 is a deficient number, since it is larger than the sum of its proper divisors (17461790019).

37904858721 is a wasteful number, since it uses less digits than its factorization.

37904858721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47322016 (or 47322013 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 37904858721 in words is "thirty-seven billion, nine hundred four million, eight hundred fifty-eight thousand, seven hundred twenty-one".