2137285778 has 8 divisors (see below), whose sum is σ = 3238979772. Its totient is φ = 1057625856.

The previous prime is 2137285771. The next prime is 2137285817. The reversal of 2137285778 is 8775827312.

It can be written as a sum of positive squares in 2 ways, for example, as 2066338849 + 70946929 = 45457^2 + 8423^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2137285771) 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, 5508275 + ... + 5508662.

Almost surely, 2^2137285778 is an apocalyptic number.

2137285778 is a deficient number, since it is larger than the sum of its proper divisors (1101693994).

2137285778 is a wasteful number, since it uses less digits than its factorization.

2137285778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11017036.

The product of its digits is 1317120, while the sum is 50.

The square root of 2137285778 is about 46230.7882043990. The cubic root of 2137285778 is about 1288.1136980408.

The spelling of 2137285778 in words is "two billion, one hundred thirty-seven million, two hundred eighty-five thousand, seven hundred seventy-eight".