61887471763 has 4 divisors (see below), whose sum is σ = 66648046528. Its totient is φ = 57126897000.

The previous prime is 61887471749. The next prime is 61887471773. The reversal of 61887471763 is 36717478816.

61887471763 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61887471763 is a prime.

It is a super-2 number, since 2×61887471763² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61887471698 and 61887471707.

It is not an unprimeable number, because it can be changed into a prime (61887471713) 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, 2380287363 + ... + 2380287388.

It is an arithmetic number, because the mean of its divisors is an integer number (16662011632).

Almost surely, 2^61887471763 is an apocalyptic number.

61887471763 is a deficient number, since it is larger than the sum of its proper divisors (4760574765).

61887471763 is a wasteful number, since it uses less digits than its factorization.

61887471763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4760574764.

The product of its digits is 9483264, while the sum is 58.

The spelling of 61887471763 in words is "sixty-one billion, eight hundred eighty-seven million, four hundred seventy-one thousand, seven hundred sixty-three".