61512855 has 16 divisors (see below), whose sum is σ = 98703360. Its totient is φ = 32712608.

The previous prime is 61512853. The next prime is 61512859. The reversal of 61512855 is 55821516.

It is a cyclic number.

It is not a de Polignac number, because 61512855 - 2¹ = 61512853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61512853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327 + ... + 11096.

It is an arithmetic number, because the mean of its divisors is an integer number (6168960).

Almost surely, 2^61512855 is an apocalyptic number.

61512855 is a deficient number, since it is larger than the sum of its proper divisors (37190505).

61512855 is a wasteful number, since it uses less digits than its factorization.

61512855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11790.

The product of its digits is 12000, while the sum is 33.

The square root of 61512855 is about 7843.0131327188. The cubic root of 61512855 is about 394.7498389311.

The spelling of 61512855 in words is "sixty-one million, five hundred twelve thousand, eight hundred fifty-five".