61216151144 has 8 divisors (see below), whose sum is σ = 114780283410. Its totient is φ = 30608075568.

The previous prime is 61216151063. The next prime is 61216151197. The reversal of 61216151144 is 44115161216.

It can be written as a sum of positive squares in only one way, i.e., 60964548100 + 251603044 = 246910^2 + 15862^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 61216151144.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3826009439 + ... + 3826009454.

Almost surely, 2^61216151144 is an apocalyptic number.

It is an amenable number.

61216151144 is a deficient number, since it is larger than the sum of its proper divisors (53564132266).

61216151144 is a wasteful number, since it uses less digits than its factorization.

61216151144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7652018899 (or 7652018895 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The spelling of 61216151144 in words is "sixty-one billion, two hundred sixteen million, one hundred fifty-one thousand, one hundred forty-four".