61655050015665 has 16 divisors (see below), whose sum is σ = 98657266248000. Its totient is φ = 32879631267392.

The previous prime is 61655050015613. The next prime is 61655050015709. The reversal of 61655050015665 is 56651005055616.

It is a cyclic number.

It is not a de Polignac number, because 61655050015665 - 2¹⁴ = 61655049999281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191213190 + ... + 191535359.

It is an arithmetic number, because the mean of its divisors is an integer number (6166079140500).

Almost surely, 2^{61655050015665} is an apocalyptic number.

It is an amenable number.

61655050015665 is a deficient number, since it is larger than the sum of its proper divisors (37002216232335).

61655050015665 is a wasteful number, since it uses less digits than its factorization.

61655050015665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382759296.

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 61655050015665 in words is "sixty-one trillion, six hundred fifty-five billion, fifty million, fifteen thousand, six hundred sixty-five".