61757145 has 24 divisors (see below), whose sum is σ = 107262792. Its totient is φ = 32870400.

The previous prime is 61757131. The next prime is 61757167. The reversal of 61757145 is 54175716.

It can be written as a sum of positive squares in 4 ways, for example, as 34257609 + 27499536 = 5853^2 + 5244^2 .

It is not a de Polignac number, because 61757145 - 2¹² = 61753049 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27775 + ... + 29915.

It is an arithmetic number, because the mean of its divisors is an integer number (4469283).

Almost surely, 2^61757145 is an apocalyptic number.

It is an amenable number.

61757145 is a deficient number, since it is larger than the sum of its proper divisors (45505647).

61757145 is a wasteful number, since it uses less digits than its factorization.

61757145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793 (or 2790 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 61757145 is about 7858.5714350638. The cubic root of 61757145 is about 395.2717139203.

The spelling of 61757145 in words is "sixty-one million, seven hundred fifty-seven thousand, one hundred forty-five".