61278775942 has 8 divisors (see below), whose sum is σ = 91919217456. Its totient is φ = 30639036792.

The previous prime is 61278775903. The next prime is 61278775963. The reversal of 61278775942 is 24957787216.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228703 + ... + 418165.

It is an arithmetic number, because the mean of its divisors is an integer number (11489902182).

Almost surely, 2^61278775942 is an apocalyptic number.

61278775942 is a deficient number, since it is larger than the sum of its proper divisors (30640441514).

61278775942 is a wasteful number, since it uses less digits than its factorization.

61278775942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351182.

The product of its digits is 11854080, while the sum is 58.

The spelling of 61278775942 in words is "sixty-one billion, two hundred seventy-eight million, seven hundred seventy-five thousand, nine hundred forty-two".