61544057 has 4 divisors (see below), whose sum is σ = 61986960. Its totient is φ = 61101156.

The previous prime is 61544053. The next prime is 61544089. The reversal of 61544057 is 75044516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61544057 - 2² = 61544053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61544053) 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, 221243 + ... + 221520.

It is an arithmetic number, because the mean of its divisors is an integer number (15496740).

Almost surely, 2^61544057 is an apocalyptic number.

It is an amenable number.

61544057 is a deficient number, since it is larger than the sum of its proper divisors (442903).

61544057 is a wasteful number, since it uses less digits than its factorization.

61544057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442902.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 61544057 is about 7845.0020395153. The cubic root of 61544057 is about 394.8165724212.

Subtracting from 61544057 its sum of digits (32), we obtain a square (61544025 = 7845²).

The spelling of 61544057 in words is "sixty-one million, five hundred forty-four thousand, fifty-seven".