78770645702642 has 8 divisors (see below), whose sum is σ = 118156452268800. Its totient is φ = 39385161613044.

The previous prime is 78770645702603. The next prime is 78770645702653. The reversal of 78770645702642 is 24620754607787.

It is a happy number.

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

It is a super-2 number, since 2×78770645702642² (a number of 29 digits) contains 22 as substring.

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, 80007542 + ... + 80986097.

It is an arithmetic number, because the mean of its divisors is an integer number (14769556533600).

Almost surely, 2^{78770645702642} is an apocalyptic number.

78770645702642 is a deficient number, since it is larger than the sum of its proper divisors (39385806566158).

78770645702642 is a wasteful number, since it uses less digits than its factorization.

78770645702642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161238280.

The product of its (nonzero) digits is 221276160, while the sum is 65.

The spelling of 78770645702642 in words is "seventy-eight trillion, seven hundred seventy billion, six hundred forty-five million, seven hundred two thousand, six hundred forty-two".