154538705657 has 32 divisors (see below), whose sum is σ = 186181632000. Its totient is φ = 125411666688.

The previous prime is 154538705623. The next prime is 154538705663. The reversal of 154538705657 is 756507835451.

It is not a de Polignac number, because 154538705657 - 2⁶ = 154538705593 is a prime.

It is a super-2 number, since 2×154538705657² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (154538705357) 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, 6413969 + ... + 6438017.

It is an arithmetic number, because the mean of its divisors is an integer number (5818176000).

Almost surely, 2^154538705657 is an apocalyptic number.

It is an amenable number.

154538705657 is a deficient number, since it is larger than the sum of its proper divisors (31642926343).

154538705657 is a wasteful number, since it uses less digits than its factorization.

154538705657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24485.

The product of its (nonzero) digits is 17640000, while the sum is 56.

The spelling of 154538705657 in words is "one hundred fifty-four billion, five hundred thirty-eight million, seven hundred five thousand, six hundred fifty-seven".