61849057 has 4 divisors (see below), whose sum is σ = 62206740. Its totient is φ = 61491376.

The previous prime is 61849049. The next prime is 61849063. The reversal of 61849057 is 75094816.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55890576 + 5958481 = 7476^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 61849057 - 2³ = 61849049 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61849097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178582 + ... + 178927.

It is an arithmetic number, because the mean of its divisors is an integer number (15551685).

Almost surely, 2^61849057 is an apocalyptic number.

It is an amenable number.

61849057 is a deficient number, since it is larger than the sum of its proper divisors (357683).

61849057 is a wasteful number, since it uses less digits than its factorization.

61849057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357682.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 61849057 is about 7864.4171430564. The cubic root of 61849057 is about 395.4677085455.

The spelling of 61849057 in words is "sixty-one million, eight hundred forty-nine thousand, fifty-seven".