78878417901 has 16 divisors (see below), whose sum is σ = 110770060800. Its totient is φ = 49789369008.

The previous prime is 78878417899. The next prime is 78878417903. The reversal of 78878417901 is 10971487887.

It is an interprime number because it is at equal distance from previous prime (78878417899) and next prime (78878417903).

It is not a de Polignac number, because 78878417901 - 2¹ = 78878417899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78878417903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296481 + ... + 495638.

It is an arithmetic number, because the mean of its divisors is an integer number (6923128800).

Almost surely, 2^78878417901 is an apocalyptic number.

It is an amenable number.

78878417901 is a deficient number, since it is larger than the sum of its proper divisors (31891642899).

78878417901 is a wasteful number, since it uses less digits than its factorization.

78878417901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793888.

The product of its (nonzero) digits is 6322176, while the sum is 60.

The spelling of 78878417901 in words is "seventy-eight billion, eight hundred seventy-eight million, four hundred seventeen thousand, nine hundred one".