61543763 has 4 divisors (see below), whose sum is σ = 61819968. Its totient is φ = 61267560.

The previous prime is 61543751. The next prime is 61543799. The reversal of 61543763 is 36734516.

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

It is a cyclic number.

It is not a de Polignac number, because 61543763 - 2¹⁶ = 61478227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61543663) 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, 137768 + ... + 138213.

It is an arithmetic number, because the mean of its divisors is an integer number (15454992).

Almost surely, 2^61543763 is an apocalyptic number.

61543763 is a deficient number, since it is larger than the sum of its proper divisors (276205).

61543763 is a wasteful number, since it uses less digits than its factorization.

61543763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276204.

The product of its digits is 45360, while the sum is 35.

The square root of 61543763 is about 7844.9833014481. The cubic root of 61543763 is about 394.8159437320.

The spelling of 61543763 in words is "sixty-one million, five hundred forty-three thousand, seven hundred sixty-three".