61025546787 has 4 divisors (see below), whose sum is σ = 81367395720. Its totient is φ = 40683697856.

The previous prime is 61025546779. The next prime is 61025546801. The reversal of 61025546787 is 78764552016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61025546787 - 2³ = 61025546779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61025545787) 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, 10170924462 + ... + 10170924467.

It is an arithmetic number, because the mean of its divisors is an integer number (20341848930).

Almost surely, 2^61025546787 is an apocalyptic number.

61025546787 is a deficient number, since it is larger than the sum of its proper divisors (20341848933).

61025546787 is a wasteful number, since it uses less digits than its factorization.

61025546787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20341848932.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 61025546787 in words is "sixty-one billion, twenty-five million, five hundred forty-six thousand, seven hundred eighty-seven".