61282490578 has 4 divisors (see below), whose sum is σ = 91923735870. Its totient is φ = 30641245288.

The previous prime is 61282490569. The next prime is 61282490587. The reversal of 61282490578 is 87509428216.

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

It is an interprime number because it is at equal distance from previous prime (61282490569) and next prime (61282490587).

It can be written as a sum of positive squares in only one way, i.e., 38147167969 + 23135322609 = 195313^2 + 152103^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15320622643 + ... + 15320622646.

Almost surely, 2^61282490578 is an apocalyptic number.

61282490578 is a deficient number, since it is larger than the sum of its proper divisors (30641245292).

61282490578 is a wasteful number, since it uses less digits than its factorization.

61282490578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30641245291.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 61282490578 in words is "sixty-one billion, two hundred eighty-two million, four hundred ninety thousand, five hundred seventy-eight".