149278507198 has 8 divisors (see below), whose sum is σ = 223923392640. Its totient is φ = 74637376320.

The previous prime is 149278507193. The next prime is 149278507297. The reversal of 149278507198 is 891705872941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×149278507198² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149278507193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837043 + ... + 999598.

It is an arithmetic number, because the mean of its divisors is an integer number (27990424080).

Almost surely, 2^149278507198 is an apocalyptic number.

149278507198 is a deficient number, since it is larger than the sum of its proper divisors (74644885442).

149278507198 is a wasteful number, since it uses less digits than its factorization.

149278507198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877282.

The product of its (nonzero) digits is 10160640, while the sum is 61.

The spelling of 149278507198 in words is "one hundred forty-nine billion, two hundred seventy-eight million, five hundred seven thousand, one hundred ninety-eight".