156858778428 has 96 divisors (see below), whose sum is σ = 410249629440. Its totient is φ = 46227824640.

The previous prime is 156858778421. The next prime is 156858778451. The reversal of 156858778428 is 824877858651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156858778421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13762300 + ... + 13773692.

It is an arithmetic number, because the mean of its divisors is an integer number (4273433640).

Almost surely, 2^156858778428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156858778428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205124814720).

156858778428 is an abundant number, since it is smaller than the sum of its proper divisors (253390851012).

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

156858778428 is a wasteful number, since it uses less digits than its factorization.

156858778428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14267 (or 14265 counting only the distinct ones).

The product of its digits is 240844800, while the sum is 69.

The spelling of 156858778428 in words is "one hundred fifty-six billion, eight hundred fifty-eight million, seven hundred seventy-eight thousand, four hundred twenty-eight".