37345099691 has 4 divisors (see below), whose sum is σ = 37592418384. Its totient is φ = 37097781000.

The previous prime is 37345099679. The next prime is 37345099717. The reversal of 37345099691 is 19699054373.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19699054373 = 29 ⋅679277737.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37345099691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37345099601) 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, 123659120 + ... + 123659421.

It is an arithmetic number, because the mean of its divisors is an integer number (9398104596).

Almost surely, 2^37345099691 is an apocalyptic number.

37345099691 is a deficient number, since it is larger than the sum of its proper divisors (247318693).

37345099691 is a wasteful number, since it uses less digits than its factorization.

37345099691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247318692.

The product of its (nonzero) digits is 5511240, while the sum is 56.

The spelling of 37345099691 in words is "thirty-seven billion, three hundred forty-five million, ninety-nine thousand, six hundred ninety-one".