156225697980 has 384 divisors, whose sum is σ = 513125673984. Its totient is φ = 35095756800.

The previous prime is 156225697967. The next prime is 156225698009. The reversal of 156225697980 is 89796522651.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 230761402 + ... + 230762078.

It is an arithmetic number, because the mean of its divisors is an integer number (1336264776).

Almost surely, 2^156225697980 is an apocalyptic number.

156225697980 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 156225697980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256562836992).

156225697980 is an abundant number, since it is smaller than the sum of its proper divisors (356899976004).

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

156225697980 is a wasteful number, since it uses less digits than its factorization.

156225697980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 1003 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 60.

The spelling of 156225697980 in words is "one hundred fifty-six billion, two hundred twenty-five million, six hundred ninety-seven thousand, nine hundred eighty".