2516766388 has 6 divisors (see below), whose sum is σ = 4404341186. Its totient is φ = 1258383192.

The previous prime is 2516766383. The next prime is 2516766389. The reversal of 2516766388 is 8836676152.

It can be written as a sum of positive squares in only one way, i.e., 2158345764 + 358420624 = 46458^2 + 18932^2 .

It is a super-2 number, since 2×2516766388² = 12668226103533133088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2516766383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314595795 + ... + 314595802.

Almost surely, 2^2516766388 is an apocalyptic number.

It is an amenable number.

2516766388 is a deficient number, since it is larger than the sum of its proper divisors (1887574798).

2516766388 is a wasteful number, since it uses less digits than its factorization.

2516766388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629191601 (or 629191599 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The square root of 2516766388 is about 50167.3837069465. The cubic root of 2516766388 is about 1360.2361160113.

It can be divided in two parts, 251676 and 6388, that added together give a square (258064 = 508²).

The spelling of 2516766388 in words is "two billion, five hundred sixteen million, seven hundred sixty-six thousand, three hundred eighty-eight".