149555555557 has 32 divisors (see below), whose sum is σ = 171795665664. Its totient is φ = 129392947200.

The previous prime is 149555555533. The next prime is 149555555561. The reversal of 149555555557 is 755555555941.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149555555557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149555555495 and 149555555504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149555555957) 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, 1004457 + ... + 1143697.

It is an arithmetic number, because the mean of its divisors is an integer number (5368614552).

Almost surely, 2^149555555557 is an apocalyptic number.

149555555557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

149555555557 is a deficient number, since it is larger than the sum of its proper divisors (22240110107).

149555555557 is a wasteful number, since it uses less digits than its factorization.

149555555557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139389.

The product of its digits is 98437500, while the sum is 61.

The spelling of 149555555557 in words is "one hundred forty-nine billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-seven".