61115110997 has 4 divisors (see below), whose sum is σ = 63772289760. Its totient is φ = 58457932236.

The previous prime is 61115110963. The next prime is 61115111051. The reversal of 61115110997 is 79901151116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61115110997 - 2¹² = 61115106901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61115118997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328589347 + ... + 1328589392.

It is an arithmetic number, because the mean of its divisors is an integer number (15943072440).

Almost surely, 2^61115110997 is an apocalyptic number.

It is an amenable number.

61115110997 is a deficient number, since it is larger than the sum of its proper divisors (2657178763).

61115110997 is a wasteful number, since it uses less digits than its factorization.

61115110997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657178762.

The product of its (nonzero) digits is 17010, while the sum is 41.

The spelling of 61115110997 in words is "sixty-one billion, one hundred fifteen million, one hundred ten thousand, nine hundred ninety-seven".