37445521805 has 4 divisors (see below), whose sum is σ = 44934626172. Its totient is φ = 29956417440.

The previous prime is 37445521759. The next prime is 37445521807. The reversal of 37445521805 is 50812554473.

37445521805 is digitally balanced in base 11, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50812554473 = 1493 ⋅34033861.

It can be written as a sum of positive squares in 2 ways, for example, as 9776858884 + 27668662921 = 98878^2 + 166339^2 .

It is not a de Polignac number, because 37445521805 - 2¹⁴ = 37445505421 is a prime.

It is a Duffinian number.

37445521805 is strictly pandigital in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37445521807) 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, 3744552176 + ... + 3744552185.

It is an arithmetic number, because the mean of its divisors is an integer number (11233656543).

Almost surely, 2^37445521805 is an apocalyptic number.

It is an amenable number.

37445521805 is a deficient number, since it is larger than the sum of its proper divisors (7489104367).

37445521805 is an equidigital number, since it uses as much as digits as its factorization.

37445521805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7489104366.

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 37445521805 in words is "thirty-seven billion, four hundred forty-five million, five hundred twenty-one thousand, eight hundred five".