61379775 has 60 divisors (see below), whose sum is σ = 120452112. Its totient is φ = 30792960.

The previous prime is 61379771. The next prime is 61379807. The reversal of 61379775 is 57797316.

It is not a de Polignac number, because 61379775 - 2² = 61379771 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 61379775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61379771) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 33534 + ... + 35316.

Almost surely, 2^61379775 is an apocalyptic number.

61379775 is a deficient number, since it is larger than the sum of its proper divisors (59072337).

61379775 is a wasteful number, since it uses less digits than its factorization.

61379775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822 (or 1808 counting only the distinct ones).

The product of its digits is 277830, while the sum is 45.

The square root of 61379775 is about 7834.5245548151. The cubic root of 61379775 is about 394.4649595155.

The spelling of 61379775 in words is "sixty-one million, three hundred seventy-nine thousand, seven hundred seventy-five".