37981662549 has 8 divisors (see below), whose sum is σ = 53307596640. Its totient is φ = 23988418416.

The previous prime is 37981662487. The next prime is 37981662557. The reversal of 37981662549 is 94526618973.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 37981662549 - 2¹³ = 37981654357 is a prime.

It is a super-2 number, since 2×37981662549² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 37981662492 and 37981662501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37981663549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333172422 + ... + 333172535.

It is an arithmetic number, because the mean of its divisors is an integer number (6663449580).

Almost surely, 2^37981662549 is an apocalyptic number.

It is an amenable number.

37981662549 is a deficient number, since it is larger than the sum of its proper divisors (15325934091).

37981662549 is a wasteful number, since it uses less digits than its factorization.

37981662549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666344979.

The product of its digits is 19595520, while the sum is 60.

The spelling of 37981662549 in words is "thirty-seven billion, nine hundred eighty-one million, six hundred sixty-two thousand, five hundred forty-nine".