61435314021665 has 16 divisors (see below), whose sum is σ = 73744268913216. Its totient is φ = 49133658100800.

The previous prime is 61435314021659. The next prime is 61435314021667. The reversal of 61435314021665 is 56612041353416.

It is not a de Polignac number, because 61435314021665 - 2¹² = 61435314017569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61435314021667) 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, 338801114 + ... + 338982396.

It is an arithmetic number, because the mean of its divisors is an integer number (4609016807076).

Almost surely, 2^{61435314021665} is an apocalyptic number.

It is an amenable number.

61435314021665 is a deficient number, since it is larger than the sum of its proper divisors (12308954891551).

61435314021665 is a wasteful number, since it uses less digits than its factorization.

61435314021665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201040.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 61435314021665 in words is "sixty-one trillion, four hundred thirty-five billion, three hundred fourteen million, twenty-one thousand, six hundred sixty-five".