61927298972099 has 32 divisors (see below), whose sum is σ = 68077295935488. Its totient is φ = 55865617920000.

The previous prime is 61927298972047. The next prime is 61927298972117. The reversal of 61927298972099 is 99027989272916.

It is a Cunningham number, because it is equal to 7869390²-1.

It is a cyclic number.

It is not a de Polignac number, because 61927298972099 - 2¹⁶ = 61927298906563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61927298972599) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1503032699 + ... + 1503073899.

It is an arithmetic number, because the mean of its divisors is an integer number (2127415497984).

Almost surely, 2^{61927298972099} is an apocalyptic number.

61927298972099 is a deficient number, since it is larger than the sum of its proper divisors (6149996963389).

61927298972099 is a wasteful number, since it uses less digits than its factorization.

61927298972099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43139.

The product of its (nonzero) digits is 1111065984, while the sum is 80.

The spelling of 61927298972099 in words is "sixty-one trillion, nine hundred twenty-seven billion, two hundred ninety-eight million, nine hundred seventy-two thousand, ninety-nine".