61142077758 has 32 divisors (see below), whose sum is σ = 123254968320. Its totient is φ = 20218985280.

The previous prime is 61142077747. The next prime is 61142077811. The reversal of 61142077758 is 85777024116.

61142077758 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3108258 + ... + 3127866.

It is an arithmetic number, because the mean of its divisors is an integer number (3851717760).

Almost surely, 2^61142077758 is an apocalyptic number.

61142077758 is an abundant number, since it is smaller than the sum of its proper divisors (62112890562).

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

61142077758 is a wasteful number, since it uses less digits than its factorization.

61142077758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23712.

The product of its (nonzero) digits is 658560, while the sum is 48.

The spelling of 61142077758 in words is "sixty-one billion, one hundred forty-two million, seventy-seven thousand, seven hundred fifty-eight".