61485642 has 20 divisors (see below), whose sum is σ = 137773746. Its totient is φ = 20495160.

The previous prime is 61485631. The next prime is 61485643. The reversal of 61485642 is 24658416.

61485642 is a `hidden beast` number, since 6 + 1 + 4 + 8 + 5 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 61449921 + 35721 = 7839^2 + 189^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61485597 and 61485606.

It is not an unprimeable number, because it can be changed into a prime (61485643) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 189609 + ... + 189932.

Almost surely, 2^61485642 is an apocalyptic number.

61485642 is an abundant number, since it is smaller than the sum of its proper divisors (76288104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61485642 is a wasteful number, since it uses less digits than its factorization.

61485642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379555 (or 379546 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 61485642 is about 7841.2780845982. The cubic root of 61485642 is about 394.6916185159.

The spelling of 61485642 in words is "sixty-one million, four hundred eighty-five thousand, six hundred forty-two".