61155575 has 12 divisors (see below), whose sum is σ = 81666648. Its totient is φ = 45160800.

The previous prime is 61155571. The next prime is 61155593. The reversal of 61155575 is 57555116.

It is not a de Polignac number, because 61155575 - 2² = 61155571 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61155571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93761 + ... + 94410.

It is an arithmetic number, because the mean of its divisors is an integer number (6805554).

Almost surely, 2^61155575 is an apocalyptic number.

61155575 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61155575 is a deficient number, since it is larger than the sum of its proper divisors (20511073).

61155575 is a wasteful number, since it uses less digits than its factorization.

61155575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188194 (or 188189 counting only the distinct ones).

The product of its digits is 26250, while the sum is 35.

The square root of 61155575 is about 7820.2030024802. The cubic root of 61155575 is about 393.9840902471.

The spelling of 61155575 in words is "sixty-one million, one hundred fifty-five thousand, five hundred seventy-five".