78378750534 has 32 divisors (see below), whose sum is σ = 179159855616. Its totient is φ = 22392875520.

The previous prime is 78378750511. The next prime is 78378750539. The reversal of 78378750534 is 43505787387.

It is a super-2 number, since 2×78378750534² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78378750539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1492959 + ... + 1544565.

It is an arithmetic number, because the mean of its divisors is an integer number (5598745488).

Almost surely, 2^78378750534 is an apocalyptic number.

78378750534 is an abundant number, since it is smaller than the sum of its proper divisors (100781105082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78378750534 is a wasteful number, since it uses less digits than its factorization.

78378750534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87780.

The product of its (nonzero) digits is 19756800, while the sum is 57.

The spelling of 78378750534 in words is "seventy-eight billion, three hundred seventy-eight million, seven hundred fifty thousand, five hundred thirty-four".