61115111016 has 16 divisors (see below), whose sum is σ = 152787777600.
Its totient is φ = 20371703664.
The previous prime is 61115110963. The next prime is 61115111051. The reversal of 61115111016 is 61011151116.
It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 2546462959 = 61115111016 / (6 + 1 + 1 + 1 + 5 + 1 + 1 + 1 + 0 + 1 + 6).
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273231456 + ... + 1273231503.
It is an arithmetic number, because the mean of its divisors is an integer number (9549236100).
Almost surely, 261115111016 is an apocalyptic number.
It is an amenable number.
61115111016 is an abundant number, since it is smaller than the sum of its proper divisors (91672666584).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
61115111016 is a wasteful number, since it uses less digits than its factorization.
61115111016 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2546462968 (or 2546462964 counting only the distinct ones).
The product of its (nonzero) digits is 180, while the sum is 24.
The spelling of 61115111016 in words is "sixty-one billion, one hundred fifteen million, one hundred eleven thousand, sixteen".