61111005050009 has 4 divisors (see below), whose sum is σ = 61113267525840. Its totient is φ = 61108742574180.

The previous prime is 61111005049999. The next prime is 61111005050057. The reversal of 61111005050009 is 90005050011116.

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 61111005050009 - 2⁴⁴ = 43518819005593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61111005350009) 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, 1131197399 + ... + 1131251420.

It is an arithmetic number, because the mean of its divisors is an integer number (15278316881460).

Almost surely, 2^{61111005050009} is an apocalyptic number.

It is an amenable number.

61111005050009 is a deficient number, since it is larger than the sum of its proper divisors (2262475831).

61111005050009 is a wasteful number, since it uses less digits than its factorization.

61111005050009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262475830.

The product of its (nonzero) digits is 1350, while the sum is 29.

The spelling of 61111005050009 in words is "sixty-one trillion, one hundred eleven billion, five million, fifty thousand, nine".