126655551 has 48 divisors (see below), whose sum is σ = 208286208. Its totient is φ = 73483200.

The previous prime is 126655547. The next prime is 126655583. The reversal of 126655551 is 155556621.

It is not a de Polignac number, because 126655551 - 2² = 126655547 is a prime.

It is a super-2 number, since 2×126655551² = 32083257198227202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126655351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259830 + ... + 260316.

It is an arithmetic number, because the mean of its divisors is an integer number (4339296).

Almost surely, 2^126655551 is an apocalyptic number.

126655551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

126655551 is a deficient number, since it is larger than the sum of its proper divisors (81630657).

126655551 is a wasteful number, since it uses less digits than its factorization.

126655551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 609 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 126655551 is about 11254.1348401376. The cubic root of 126655551 is about 502.1977271705.

The spelling of 126655551 in words is "one hundred twenty-six million, six hundred fifty-five thousand, five hundred fifty-one".