154019986491 has 32 divisors (see below), whose sum is σ = 244490752000. Its totient is φ = 84390906240.

The previous prime is 154019986489. The next prime is 154019986499. The reversal of 154019986491 is 194689910451.

It is not a de Polignac number, because 154019986491 - 2¹ = 154019986489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154019986499) 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, 1014316 + ... + 1156233.

It is an arithmetic number, because the mean of its divisors is an integer number (7640336000).

Almost surely, 2^154019986491 is an apocalyptic number.

154019986491 is a deficient number, since it is larger than the sum of its proper divisors (90470765509).

154019986491 is a wasteful number, since it uses less digits than its factorization.

154019986491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170699.

The product of its (nonzero) digits is 2799360, while the sum is 57.

The spelling of 154019986491 in words is "one hundred fifty-four billion, nineteen million, nine hundred eighty-six thousand, four hundred ninety-one".