78742215235 has 16 divisors (see below), whose sum is σ = 98158640832. Its totient is φ = 60591731200.

The previous prime is 78742215217. The next prime is 78742215269. The reversal of 78742215235 is 53251224787.

It is not a de Polignac number, because 78742215235 - 2¹³ = 78742207043 is a prime.

It is a super-2 number, since 2×78742215235² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2690434 + ... + 2719543.

It is an arithmetic number, because the mean of its divisors is an integer number (6134915052).

Almost surely, 2^78742215235 is an apocalyptic number.

78742215235 is a deficient number, since it is larger than the sum of its proper divisors (19416425597).

78742215235 is a wasteful number, since it uses less digits than its factorization.

78742215235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410094.

The product of its digits is 940800, while the sum is 46.

The spelling of 78742215235 in words is "seventy-eight billion, seven hundred forty-two million, two hundred fifteen thousand, two hundred thirty-five".