401836139250 has 256 divisors, whose sum is σ = 1241612596224. Its totient is φ = 84290457600.

The previous prime is 401836139249. The next prime is 401836139279. The reversal of 401836139250 is 52931638104.

It is a super-2 number, since 2×401836139250² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 11790234 + ... + 11824266.

It is an arithmetic number, because the mean of its divisors is an integer number (4850049204).

Almost surely, 2^401836139250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401836139250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620806298112).

401836139250 is an abundant number, since it is smaller than the sum of its proper divisors (839776456974).

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

401836139250 is a wasteful number, since it uses less digits than its factorization.

401836139250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34246 (or 34236 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 401836139250 in words is "four hundred one billion, eight hundred thirty-six million, one hundred thirty-nine thousand, two hundred fifty".