61615655 has 16 divisors (see below), whose sum is σ = 75254400. Its totient is φ = 48422400.

The previous prime is 61615573. The next prime is 61615663. The reversal of 61615655 is 55651616.

61615655 = T₄₉₆₂ + T₄₉₆₃ + ... + T₄₉₆₆.

It is not a de Polignac number, because 61615655 - 2¹⁴ = 61599271 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153455 + ... + 153855.

It is an arithmetic number, because the mean of its divisors is an integer number (4703400).

Almost surely, 2^61615655 is an apocalyptic number.

61615655 is a deficient number, since it is larger than the sum of its proper divisors (13638745).

61615655 is a wasteful number, since it uses less digits than its factorization.

61615655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874.

The product of its digits is 27000, while the sum is 35.

The square root of 61615655 is about 7849.5640006309. The cubic root of 61615655 is about 394.9696179163.

The spelling of 61615655 in words is "sixty-one million, six hundred fifteen thousand, six hundred fifty-five".