61543357 has 4 divisors (see below), whose sum is σ = 61672320. Its totient is φ = 61414396.

The previous prime is 61543333. The next prime is 61543367. The reversal of 61543357 is 75334516.

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 61543357 - 2²³ = 53154749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61543367) 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, 63763 + ... + 64720.

It is an arithmetic number, because the mean of its divisors is an integer number (15418080).

Almost surely, 2^61543357 is an apocalyptic number.

It is an amenable number.

61543357 is a deficient number, since it is larger than the sum of its proper divisors (128963).

61543357 is a wasteful number, since it uses less digits than its factorization.

61543357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128962.

The product of its digits is 37800, while the sum is 34.

The square root of 61543357 is about 7844.9574249960. The cubic root of 61543357 is about 394.8150755388.

The spelling of 61543357 in words is "sixty-one million, five hundred forty-three thousand, three hundred fifty-seven".