149978868154 has 16 divisors (see below), whose sum is σ = 238220089128. Its totient is φ = 70572851712.

The previous prime is 149978868113. The next prime is 149978868163. The reversal of 149978868154 is 451868879941.

It can be written as a sum of positive squares in 4 ways, for example, as 123817423129 + 26161445025 = 351877^2 + 161745^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296224 + ... + 622660.

Almost surely, 2^149978868154 is an apocalyptic number.

149978868154 is a deficient number, since it is larger than the sum of its proper divisors (88241220974).

149978868154 is a wasteful number, since it uses less digits than its factorization.

149978868154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339969.

The product of its digits is 139345920, while the sum is 70.

The spelling of 149978868154 in words is "one hundred forty-nine billion, nine hundred seventy-eight million, eight hundred sixty-eight thousand, one hundred fifty-four".