61011765787 has 16 divisors (see below), whose sum is σ = 75106455552. Its totient is φ = 48408449760.

The previous prime is 61011765767. The next prime is 61011765847. The reversal of 61011765787 is 78756711016.

61011765787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61011765787 - 2¹⁵ = 61011733019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61011765787.

It is not an unprimeable number, because it can be changed into a prime (61011765707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6107188 + ... + 6117169.

It is an arithmetic number, because the mean of its divisors is an integer number (4694153472).

Almost surely, 2^61011765787 is an apocalyptic number.

61011765787 is a deficient number, since it is larger than the sum of its proper divisors (14094689765).

61011765787 is a wasteful number, since it uses less digits than its factorization.

61011765787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12224418.

The product of its (nonzero) digits is 493920, while the sum is 49.

The spelling of 61011765787 in words is "sixty-one billion, eleven million, seven hundred sixty-five thousand, seven hundred eighty-seven".