37649856798991 has 4 divisors (see below), whose sum is σ = 37710680477800. Its totient is φ = 37589033120184.

The previous prime is 37649856798947. The next prime is 37649856799043. The reversal of 37649856798991 is 19989765894673.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 37649856798991 - 2⁷ = 37649856798863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 37649856798896 and 37649856798905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37649856798941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30411838476 + ... + 30411839713.

It is an arithmetic number, because the mean of its divisors is an integer number (9427670119450).

Almost surely, 2^{37649856798991} is an apocalyptic number.

37649856798991 is a deficient number, since it is larger than the sum of its proper divisors (60823678809).

37649856798991 is an equidigital number, since it uses as much as digits as its factorization.

37649856798991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60823678808.

The product of its digits is 44442639360, while the sum is 91.

The spelling of 37649856798991 in words is "thirty-seven trillion, six hundred forty-nine billion, eight hundred fifty-six million, seven hundred ninety-eight thousand, nine hundred ninety-one".