61085551 has 8 divisors (see below), whose sum is σ = 64903680. Its totient is φ = 57327768.

The previous prime is 61085537. The next prime is 61085561. The reversal of 61085551 is 15558016.

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 61085551 - 2¹⁷ = 60954479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61085561) 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, 12991 + ... + 17056.

It is an arithmetic number, because the mean of its divisors is an integer number (8112960).

Almost surely, 2^61085551 is an apocalyptic number.

61085551 is a deficient number, since it is larger than the sum of its proper divisors (3818129).

61085551 is a wasteful number, since it uses less digits than its factorization.

61085551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30173.

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 61085551 is about 7815.7245985257. The cubic root of 61085551 is about 393.8336603623.

The spelling of 61085551 in words is "sixty-one million, eighty-five thousand, five hundred fifty-one".