61655053787 has 2 divisors, whose sum is σ = 61655053788. Its totient is φ = 61655053786.

The previous prime is 61655053783. The next prime is 61655053829. The reversal of 61655053787 is 78735055616.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61655053787 - 2² = 61655053783 is a prime.

It is not a weakly prime, because it can be changed into another prime (61655053783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30827526893 + 30827526894.

It is an arithmetic number, because the mean of its divisors is an integer number (30827526894).

Almost surely, 2^61655053787 is an apocalyptic number.

61655053787 is a deficient number, since it is larger than the sum of its proper divisors (1).

61655053787 is an equidigital number, since it uses as much as digits as its factorization.

61655053787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292000, while the sum is 53.

The spelling of 61655053787 in words is "sixty-one billion, six hundred fifty-five million, fifty-three thousand, seven hundred eighty-seven".