149878378515 has 8 divisors (see below), whose sum is σ = 239805405648. Its totient is φ = 79935135200.

The previous prime is 149878378439. The next prime is 149878378523. The reversal of 149878378515 is 515873878941.

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

It is not a de Polignac number, because 149878378515 - 2⁸ = 149878378259 is a prime.

It is a super-2 number, since 2×149878378515² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4995945936 + ... + 4995945965.

It is an arithmetic number, because the mean of its divisors is an integer number (29975675706).

Almost surely, 2^149878378515 is an apocalyptic number.

149878378515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

149878378515 is a deficient number, since it is larger than the sum of its proper divisors (89927027133).

149878378515 is an equidigital number, since it uses as much as digits as its factorization.

149878378515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9991891909.

The product of its digits is 67737600, while the sum is 66.

The spelling of 149878378515 in words is "one hundred forty-nine billion, eight hundred seventy-eight million, three hundred seventy-eight thousand, five hundred fifteen".