154638545780 has 12 divisors (see below), whose sum is σ = 324740946180. Its totient is φ = 61855418304.

The previous prime is 154638545771. The next prime is 154638545801. The reversal of 154638545780 is 87545836451.

It can be written as a sum of positive squares in 2 ways, for example, as 55083151204 + 99555394576 = 234698^2 + 315524^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3865963625 + ... + 3865963664.

It is an arithmetic number, because the mean of its divisors is an integer number (27061745515).

Almost surely, 2^154638545780 is an apocalyptic number.

154638545780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154638545780 is an abundant number, since it is smaller than the sum of its proper divisors (170102400400).

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

154638545780 is a wasteful number, since it uses less digits than its factorization.

154638545780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7731927298 (or 7731927296 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 56.

The spelling of 154638545780 in words is "one hundred fifty-four billion, six hundred thirty-eight million, five hundred forty-five thousand, seven hundred eighty".