149423739840 has 672 divisors, whose sum is σ = 568303257600. Its totient is φ = 35888209920.

The previous prime is 149423739823. The next prime is 149423739847. The reversal of 149423739840 is 48937324941.

149423739840 is a `hidden beast` number, since 1 + 494 + 2 + 3 + 73 + 9 + 84 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149423739847) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 100082134 + ... + 100083626.

Almost surely, 2^149423739840 is an apocalyptic number.

149423739840 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 149423739840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284151628800).

149423739840 is an abundant number, since it is smaller than the sum of its proper divisors (418879517760).

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

149423739840 is a wasteful number, since it uses less digits than its factorization.

149423739840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625 (or 1612 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 149423739840 in words is "one hundred forty-nine billion, four hundred twenty-three million, seven hundred thirty-nine thousand, eight hundred forty".