61657461 has 6 divisors (see below), whose sum is σ = 89060790. Its totient is φ = 41104968.

The previous prime is 61657423. The next prime is 61657483. The reversal of 61657461 is 16475616.

It can be written as a sum of positive squares in only one way, i.e., 39614436 + 22043025 = 6294^2 + 4695^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61657461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61657361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3425406 + ... + 3425423.

It is an arithmetic number, because the mean of its divisors is an integer number (14843465).

Almost surely, 2^61657461 is an apocalyptic number.

It is an amenable number.

61657461 is a deficient number, since it is larger than the sum of its proper divisors (27403329).

61657461 is a wasteful number, since it uses less digits than its factorization.

61657461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6850835 (or 6850832 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 61657461 is about 7852.2264995350. The cubic root of 61657461 is about 395.0589262087.

The spelling of 61657461 in words is "sixty-one million, six hundred fifty-seven thousand, four hundred sixty-one".