154979277091 has 2 divisors, whose sum is σ = 154979277092. Its totient is φ = 154979277090.

The previous prime is 154979277073. The next prime is 154979277119. The reversal of 154979277091 is 190772979451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 154979277091 - 2⁹ = 154979276579 is a prime.

It is not a weakly prime, because it can be changed into another prime (154979217091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77489638545 + 77489638546.

It is an arithmetic number, because the mean of its divisors is an integer number (77489638546).

Almost surely, 2^154979277091 is an apocalyptic number.

154979277091 is a deficient number, since it is larger than the sum of its proper divisors (1).

154979277091 is an equidigital number, since it uses as much as digits as its factorization.

154979277091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10001880, while the sum is 61.

The spelling of 154979277091 in words is "one hundred fifty-four billion, nine hundred seventy-nine million, two hundred seventy-seven thousand, ninety-one".