61454545786 has 4 divisors (see below), whose sum is σ = 92181818682. Its totient is φ = 30727272892.

The previous prime is 61454545781. The next prime is 61454545819. The reversal of 61454545786 is 68754545416.

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

It can be written as a sum of positive squares in only one way, i.e., 58866890625 + 2587655161 = 242625^2 + 50869^2 .

It is a super-2 number, since 2×61454545786² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61454545781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15363636445 + ... + 15363636448.

Almost surely, 2^61454545786 is an apocalyptic number.

61454545786 is a deficient number, since it is larger than the sum of its proper divisors (30727272896).

61454545786 is a wasteful number, since it uses less digits than its factorization.

61454545786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30727272895.

The product of its digits is 16128000, while the sum is 55.

The spelling of 61454545786 in words is "sixty-one billion, four hundred fifty-four million, five hundred forty-five thousand, seven hundred eighty-six".