36778457885 has 16 divisors (see below), whose sum is σ = 47534750256. Its totient is φ = 27156238848.

The previous prime is 36778457819. The next prime is 36778457899. The reversal of 36778457885 is 58875487763.

It can be written as a sum of positive squares in 8 ways, for example, as 662496121 + 36115961764 = 25739^2 + 190042^2 .

It is a cyclic number.

It is not a de Polignac number, because 36778457885 - 2¹⁰ = 36778456861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609287 + ... + 666923.

It is an arithmetic number, because the mean of its divisors is an integer number (2970921891).

Almost surely, 2^36778457885 is an apocalyptic number.

It is an amenable number.

36778457885 is a deficient number, since it is larger than the sum of its proper divisors (10756292371).

36778457885 is a wasteful number, since it uses less digits than its factorization.

36778457885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67472.

The product of its digits is 316108800, while the sum is 68.

The spelling of 36778457885 in words is "thirty-six billion, seven hundred seventy-eight million, four hundred fifty-seven thousand, eight hundred eighty-five".