77249042154 has 24 divisors (see below), whose sum is σ = 167379060420. Its totient is φ = 25748736768.

The previous prime is 77249042149. The next prime is 77249042173. The reversal of 77249042154 is 45124094277.

77249042154 is a `hidden beast` number, since 7 + 7 + 2 + 490 + 4 + 2 + 154 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 45252776529 + 31996265625 = 212727^2 + 178875^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 571002 + ... + 693210.

Almost surely, 2^77249042154 is an apocalyptic number.

77249042154 is an abundant number, since it is smaller than the sum of its proper divisors (90130018266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77249042154 is a wasteful number, since it uses less digits than its factorization.

77249042154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157334 (or 157331 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 77249042154 in words is "seventy-seven billion, two hundred forty-nine million, forty-two thousand, one hundred fifty-four".