78721463161475 has 48 divisors (see below), whose sum is σ = 98037131992800. Its totient is φ = 62705301120000.

The previous prime is 78721463161459. The next prime is 78721463161483. The reversal of 78721463161475 is 57416136412787.

It is a happy number.

It is not a de Polignac number, because 78721463161475 - 2⁴ = 78721463161459 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19205038976 + ... + 19205043074.

It is an arithmetic number, because the mean of its divisors is an integer number (2042440249850).

Almost surely, 2^{78721463161475} is an apocalyptic number.

78721463161475 is a deficient number, since it is larger than the sum of its proper divisors (19315668831325).

78721463161475 is a wasteful number, since it uses less digits than its factorization.

78721463161475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752 (or 7747 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 62.

The spelling of 78721463161475 in words is "seventy-eight trillion, seven hundred twenty-one billion, four hundred sixty-three million, one hundred sixty-one thousand, four hundred seventy-five".