61678415804 has 6 divisors (see below), whose sum is σ = 107937227664. Its totient is φ = 30839207900.

The previous prime is 61678415801. The next prime is 61678415849. The reversal of 61678415804 is 40851487616.

It is a super-2 number, since 2×61678415804² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61678415801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7709801972 + ... + 7709801979.

It is an arithmetic number, because the mean of its divisors is an integer number (17989537944).

Almost surely, 2^61678415804 is an apocalyptic number.

It is an amenable number.

61678415804 is a deficient number, since it is larger than the sum of its proper divisors (46258811860).

61678415804 is a wasteful number, since it uses less digits than its factorization.

61678415804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15419603955 (or 15419603953 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 61678415804 in words is "sixty-one billion, six hundred seventy-eight million, four hundred fifteen thousand, eight hundred four".