61622121516 has 12 divisors (see below), whose sum is σ = 143784950232. Its totient is φ = 20540707168.

The previous prime is 61622121497. The next prime is 61622121527. The reversal of 61622121516 is 61512122616.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2567588385 + ... + 2567588408.

It is an arithmetic number, because the mean of its divisors is an integer number (11982079186).

Almost surely, 2^61622121516 is an apocalyptic number.

It is an amenable number.

61622121516 is an abundant number, since it is smaller than the sum of its proper divisors (82162828716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61622121516 is a wasteful number, since it uses less digits than its factorization.

61622121516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135176800 (or 5135176798 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The spelling of 61622121516 in words is "sixty-one billion, six hundred twenty-two million, one hundred twenty-one thousand, five hundred sixteen".