61210888961 has 8 divisors (see below), whose sum is σ = 63458980200. Its totient is φ = 58971955840.

The previous prime is 61210888943. The next prime is 61210888997. The reversal of 61210888961 is 16988801216.

It can be written as a sum of positive squares in 4 ways, for example, as 118374400 + 61092514561 = 10880^2 + 247169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61210888961 - 2⁶ = 61210888897 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 (61210888261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2275916 + ... + 2302653.

It is an arithmetic number, because the mean of its divisors is an integer number (7932372525).

Almost surely, 2^61210888961 is an apocalyptic number.

It is an amenable number.

61210888961 is a deficient number, since it is larger than the sum of its proper divisors (2248091239).

61210888961 is a wasteful number, since it uses less digits than its factorization.

61210888961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4579059.

The product of its (nonzero) digits is 331776, while the sum is 50.

The spelling of 61210888961 in words is "sixty-one billion, two hundred ten million, eight hundred eighty-eight thousand, nine hundred sixty-one".