156777140 has 96 divisors (see below), whose sum is σ = 373591680. Its totient is φ = 54867456.

The previous prime is 156777133. The next prime is 156777143. The reversal of 156777140 is 41777651.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 156777094 and 156777103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156777143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 413471 + ... + 413849.

It is an arithmetic number, because the mean of its divisors is an integer number (3891580).

Almost surely, 2^156777140 is an apocalyptic number.

156777140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156777140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186795840).

156777140 is an abundant number, since it is smaller than the sum of its proper divisors (216814540).

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

156777140 is a wasteful number, since it uses less digits than its factorization.

156777140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 156777140 is about 12521.0678458349. The cubic root of 156777140 is about 539.2136932732.

The spelling of 156777140 in words is "one hundred fifty-six million, seven hundred seventy-seven thousand, one hundred forty".