1978199226151 has 32 divisors (see below), whose sum is σ = 2069792524800. Its totient is φ = 1888300632960.

The previous prime is 1978199226127. The next prime is 1978199226167. The reversal of 1978199226151 is 1516229918791.

It is not a de Polignac number, because 1978199226151 - 2⁵ = 1978199226119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1978199226151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978199226251) 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, 1282046686 + ... + 1282048228.

It is an arithmetic number, because the mean of its divisors is an integer number (64681016400).

Almost surely, 2^{1978199226151} is an apocalyptic number.

1978199226151 is a deficient number, since it is larger than the sum of its proper divisors (91593298649).

1978199226151 is a wasteful number, since it uses less digits than its factorization.

1978199226151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839.

The product of its digits is 4898880, while the sum is 61.

The spelling of 1978199226151 in words is "one trillion, nine hundred seventy-eight billion, one hundred ninety-nine million, two hundred twenty-six thousand, one hundred fifty-one".