37628513561 has 8 divisors (see below), whose sum is σ = 38649531720. Its totient is φ = 36607707648.

The previous prime is 37628513519. The next prime is 37628513569. The reversal of 37628513561 is 16531582673.

It can be written as a sum of positive squares in 4 ways, for example, as 9451533961 + 28176979600 = 97219^2 + 167860^2 .

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

It is not a de Polignac number, because 37628513561 - 2¹⁴ = 37628497177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (37628513569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346595 + ... + 442023.

It is an arithmetic number, because the mean of its divisors is an integer number (4831191465).

Almost surely, 2^37628513561 is an apocalyptic number.

It is an amenable number.

37628513561 is a deficient number, since it is larger than the sum of its proper divisors (1021018159).

37628513561 is a wasteful number, since it uses less digits than its factorization.

37628513561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106123.

The product of its digits is 907200, while the sum is 47.

The spelling of 37628513561 in words is "thirty-seven billion, six hundred twenty-eight million, five hundred thirteen thousand, five hundred sixty-one".