61621155612010 has 16 divisors (see below), whose sum is σ = 117442673049096. Its totient is φ = 23198552700928.

The previous prime is 61621155611989. The next prime is 61621155612041. The reversal of 61621155612010 is 1021655112616.

It can be written as a sum of positive squares in 4 ways, for example, as 52573651091361 + 9047504520649 = 7250769^2 + 3007907^2 .

It is a super-3 number, since 3×61621155612010³ (a number of 42 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181238692807 + ... + 181238693146.

Almost surely, 2^{61621155612010} is an apocalyptic number.

61621155612010 is a deficient number, since it is larger than the sum of its proper divisors (55821517437086).

61621155612010 is a wasteful number, since it uses less digits than its factorization.

61621155612010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362477385977.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 61621155612010 in words is "sixty-one trillion, six hundred twenty-one billion, one hundred fifty-five million, six hundred twelve thousand, ten".