15399742094450 has 48 divisors (see below), whose sum is σ = 33103265898240. Its totient is φ = 5220586715520.

The previous prime is 15399742094423. The next prime is 15399742094467. The reversal of 15399742094450 is 5449024799351.

It is a happy number.

It is a super-3 number, since 3×15399742094450³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247155722 + ... + 247218021.

It is an arithmetic number, because the mean of its divisors is an integer number (689651372880).

Almost surely, 2^{15399742094450} is an apocalyptic number.

15399742094450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15399742094450 is an abundant number, since it is smaller than the sum of its proper divisors (17703523803790).

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

15399742094450 is a wasteful number, since it uses less digits than its factorization.

15399742094450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494373851 (or 494373846 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 62.

The spelling of 15399742094450 in words is "fifteen trillion, three hundred ninety-nine billion, seven hundred forty-two million, ninety-four thousand, four hundred fifty".