61738078 has 4 divisors (see below), whose sum is σ = 92607120. Its totient is φ = 30869038.

The previous prime is 61738051. The next prime is 61738109. The reversal of 61738078 is 87083716.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 61738078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15434518 + ... + 15434521.

It is an arithmetic number, because the mean of its divisors is an integer number (23151780).

Almost surely, 2^61738078 is an apocalyptic number.

61738078 is a deficient number, since it is larger than the sum of its proper divisors (30869042).

61738078 is a wasteful number, since it uses less digits than its factorization.

61738078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30869041.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 61738078 is about 7857.3582074384. The cubic root of 61738078 is about 395.2310307921.

The spelling of 61738078 in words is "sixty-one million, seven hundred thirty-eight thousand, seventy-eight".