37661372919 has 12 divisors (see below), whose sum is σ = 54402074376. Its totient is φ = 25106514192.

The previous prime is 37661372893. The next prime is 37661372921. The reversal of 37661372919 is 91927316673.

It is a happy number.

37661372919 is a `hidden beast` number, since 3 + 7 + 6 + 613 + 7 + 2 + 9 + 19 = 666.

It is not a de Polignac number, because 37661372919 - 2⁵ = 37661372887 is a prime.

It is a super-2 number, since 2×37661372919² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37661372989) 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, 175909 + ... + 325985.

It is an arithmetic number, because the mean of its divisors is an integer number (4533506198).

Almost surely, 2^37661372919 is an apocalyptic number.

37661372919 is a deficient number, since it is larger than the sum of its proper divisors (16740701457).

37661372919 is a wasteful number, since it uses less digits than its factorization.

37661372919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177966 (or 177963 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The spelling of 37661372919 in words is "thirty-seven billion, six hundred sixty-one million, three hundred seventy-two thousand, nine hundred nineteen".