61277642 has 4 divisors (see below), whose sum is σ = 91916466. Its totient is φ = 30638820.

The previous prime is 61277633. The next prime is 61277647. The reversal of 61277642 is 24677216.

61277642 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 can be written as a sum of positive squares in only one way, i.e., 50708641 + 10569001 = 7121^2 + 3251^2 .

It is a super-3 number, since 3×61277642³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61277647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15319409 + ... + 15319412.

Almost surely, 2^61277642 is an apocalyptic number.

61277642 is a deficient number, since it is larger than the sum of its proper divisors (30638824).

61277642 is a wasteful number, since it uses less digits than its factorization.

61277642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30638823.

The product of its digits is 28224, while the sum is 35.

The square root of 61277642 is about 7828.0037046491. The cubic root of 61277642 is about 394.2460477969.

The spelling of 61277642 in words is "sixty-one million, two hundred seventy-seven thousand, six hundred forty-two".