61001775 has 24 divisors (see below), whose sum is σ = 112063760. Its totient is φ = 32533920.

The previous prime is 61001767. The next prime is 61001803. The reversal of 61001775 is 57710016.

61001775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61001775 - 2³ = 61001767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44512 + ... + 45861.

Almost surely, 2^61001775 is an apocalyptic number.

61001775 is a deficient number, since it is larger than the sum of its proper divisors (51061985).

61001775 is a wasteful number, since it uses less digits than its factorization.

61001775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90392 (or 90381 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 61001775 is about 7810.3633078110. The cubic root of 61001775 is about 393.6535364603.

It can be divided in two parts, 61001 and 775, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 61001775 in words is "sixty-one million, one thousand, seven hundred seventy-five".