61051550993 has 4 divisors (see below), whose sum is σ = 61962768240. Its totient is φ = 60140333748.

The previous prime is 61051550981. The next prime is 61051551023. The reversal of 61051550993 is 39905515016.

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 61051550993 - 2⁸ = 61051550737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61051555993) 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, 455608523 + ... + 455608656.

It is an arithmetic number, because the mean of its divisors is an integer number (15490692060).

Almost surely, 2^61051550993 is an apocalyptic number.

It is an amenable number.

61051550993 is a deficient number, since it is larger than the sum of its proper divisors (911217247).

61051550993 is an equidigital number, since it uses as much as digits as its factorization.

61051550993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911217246.

The product of its (nonzero) digits is 182250, while the sum is 44.

The spelling of 61051550993 in words is "sixty-one billion, fifty-one million, five hundred fifty thousand, nine hundred ninety-three".