156406320420 has 192 divisors, whose sum is σ = 502964453376. Its totient is φ = 35574497280.

The previous prime is 156406320401. The next prime is 156406320463. The reversal of 156406320420 is 24023604651.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 98802949 + ... + 98804531.

It is an arithmetic number, because the mean of its divisors is an integer number (2619606528).

Almost surely, 2^156406320420 is an apocalyptic number.

156406320420 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 156406320420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251482226688).

156406320420 is an abundant number, since it is smaller than the sum of its proper divisors (346558132956).

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

156406320420 is a wasteful number, since it uses less digits than its factorization.

156406320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610 (or 2608 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 156406320420 in words is "one hundred fifty-six billion, four hundred six million, three hundred twenty thousand, four hundred twenty".