61738618078 has 8 divisors (see below), whose sum is σ = 92614230072. Its totient is φ = 30867208056.

The previous prime is 61738618061. The next prime is 61738618121. The reversal of 61738618078 is 87081683716.

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

It is a super-2 number, since 2×61738618078² (a number of 22 digits) contains 22 as substring.

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, 1013500 + ... + 1072687.

It is an arithmetic number, because the mean of its divisors is an integer number (11576778759).

Almost surely, 2^61738618078 is an apocalyptic number.

61738618078 is a deficient number, since it is larger than the sum of its proper divisors (30875611994).

61738618078 is a wasteful number, since it uses less digits than its factorization.

61738618078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100986.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 61738618078 in words is "sixty-one billion, seven hundred thirty-eight million, six hundred eighteen thousand, seventy-eight".