61541065572999 has 16 divisors (see below), whose sum is σ = 82599543665664. Its totient is φ = 40754991348000.

The previous prime is 61541065572997. The next prime is 61541065573027. The reversal of 61541065572999 is 99927556014516.

It is not a de Polignac number, because 61541065572999 - 2¹ = 61541065572997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61541065572997) 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, 26751714 + ... + 28960944.

It is an arithmetic number, because the mean of its divisors is an integer number (5162471479104).

Almost surely, 2^{61541065572999} is an apocalyptic number.

61541065572999 is a deficient number, since it is larger than the sum of its proper divisors (21058478092665).

61541065572999 is a wasteful number, since it uses less digits than its factorization.

61541065572999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270878.

The product of its (nonzero) digits is 183708000, while the sum is 69.

The spelling of 61541065572999 in words is "sixty-one trillion, five hundred forty-one billion, sixty-five million, five hundred seventy-two thousand, nine hundred ninety-nine".