5011156777661 has 4 divisors (see below), whose sum is σ = 5011161265500. Its totient is φ = 5011152289824.

The previous prime is 5011156777657. The next prime is 5011156777673. The reversal of 5011156777661 is 1667776511105.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1477941078436 + 3533215699225 = 1215706^2 + 1879685^2 .

It is a cyclic number.

It is not a de Polignac number, because 5011156777661 - 2² = 5011156777657 is a prime.

It is a super-2 number, since 2×5011156777661² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5011156771661) 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, 889505 + ... + 3288393.

It is an arithmetic number, because the mean of its divisors is an integer number (1252790316375).

Almost surely, 2^{5011156777661} is an apocalyptic number.

It is an amenable number.

5011156777661 is a deficient number, since it is larger than the sum of its proper divisors (4487839).

5011156777661 is a wasteful number, since it uses less digits than its factorization.

5011156777661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487838.

The product of its (nonzero) digits is 1852200, while the sum is 53.

The spelling of 5011156777661 in words is "five trillion, eleven billion, one hundred fifty-six million, seven hundred seventy-seven thousand, six hundred sixty-one".