15400998912 has 384 divisors, whose sum is σ = 46918872000. Its totient is φ = 4459069440.

The previous prime is 15400998911. The next prime is 15400998913. The reversal of 15400998912 is 21989900451.

It is an interprime number because it is at equal distance from previous prime (15400998911) and next prime (15400998913).

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15400998911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141293514 + ... + 141293622.

Almost surely, 2^15400998912 is an apocalyptic number.

15400998912 is a gapful number since it is divisible by the number (12) 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 15400998912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23459436000).

15400998912 is an abundant number, since it is smaller than the sum of its proper divisors (31517873088).

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

15400998912 is a wasteful number, since it uses less digits than its factorization.

15400998912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 15400998912 in words is "fifteen billion, four hundred million, nine hundred ninety-eight thousand, nine hundred twelve".