61617678342 has 32 divisors (see below), whose sum is σ = 134732813184. Its totient is φ = 18631156800.

The previous prime is 61617678277. The next prime is 61617678377. The reversal of 61617678342 is 24387671616.

It is a happy number.

It is a super-3 number, since 3×61617678342³ (a number of 33 digits) contains 333 as substring.

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, 991284 + ... + 1051607.

It is an arithmetic number, because the mean of its divisors is an integer number (4210400412).

Almost surely, 2^61617678342 is an apocalyptic number.

61617678342 is an abundant number, since it is smaller than the sum of its proper divisors (73115134842).

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

61617678342 is a wasteful number, since it uses less digits than its factorization.

61617678342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043364.

The product of its digits is 2032128, while the sum is 51.

The spelling of 61617678342 in words is "sixty-one billion, six hundred seventeen million, six hundred seventy-eight thousand, three hundred forty-two".