156250000640 has 72 divisors (see below), whose sum is σ = 375464285448. Its totient is φ = 62300160000.

The previous prime is 156250000637. The next prime is 156250000651. The reversal of 156250000640 is 46000052651.

It can be written as a sum of positive squares in 4 ways, for example, as 15619000576 + 140631000064 = 124976^2 + 375008^2 .

It is a sliding number, since 156250000640 = 640 + 156250000000 and 1/640 + 1/156250000000 = 0.00156250000640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205640 + ... + 595640.

Almost surely, 2^156250000640 is an apocalyptic number.

156250000640 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 156250000640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187732142724).

156250000640 is an abundant number, since it is smaller than the sum of its proper divisors (219214284808).

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

156250000640 is an equidigital number, since it uses as much as digits as its factorization.

156250000640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390335 (or 390321 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

It can be divided in two parts, 156250000 and 640, that multiplied together give a 11-th power (100000000000 = 10¹¹).

The spelling of 156250000640 in words is "one hundred fifty-six billion, two hundred fifty million, six hundred forty", and thus it is an aban number.