61403540642 has 8 divisors (see below), whose sum is σ = 92830550016. Its totient is φ = 30460023972.

The previous prime is 61403540641. The next prime is 61403540707. The reversal of 61403540642 is 24604530416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61403540641) 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, 120872858 + ... + 120873365.

It is an arithmetic number, because the mean of its divisors is an integer number (11603818752).

Almost surely, 2^61403540642 is an apocalyptic number.

61403540642 is a deficient number, since it is larger than the sum of its proper divisors (31427009374).

61403540642 is a wasteful number, since it uses less digits than its factorization.

61403540642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241746352.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 61403540642 in words is "sixty-one billion, four hundred three million, five hundred forty thousand, six hundred forty-two".