61051005059991 has 16 divisors (see below), whose sum is σ = 81439868007168. Its totient is φ = 40681408680000.

The previous prime is 61051005059983. The next prime is 61051005060011. The reversal of 61051005059991 is 19995050015016.

It is not a de Polignac number, because 61051005059991 - 2³ = 61051005059983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61051505059991) 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, 95704291 + ... + 96340091.

It is an arithmetic number, because the mean of its divisors is an integer number (5089991750448).

Almost surely, 2^{61051005059991} is an apocalyptic number.

61051005059991 is a deficient number, since it is larger than the sum of its proper divisors (20388862947177).

61051005059991 is a wasteful number, since it uses less digits than its factorization.

61051005059991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650902.

The product of its (nonzero) digits is 546750, while the sum is 51.

The spelling of 61051005059991 in words is "sixty-one trillion, fifty-one billion, five million, fifty-nine thousand, nine hundred ninety-one".