145726551 has 24 divisors (see below), whose sum is σ = 220403040. Its totient is φ = 92606976.

The previous prime is 145726547. The next prime is 145726571. The reversal of 145726551 is 155627541.

It is not a de Polignac number, because 145726551 - 2² = 145726547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145726501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68715 + ... + 70803.

It is an arithmetic number, because the mean of its divisors is an integer number (9183460).

Almost surely, 2^145726551 is an apocalyptic number.

145726551 is a deficient number, since it is larger than the sum of its proper divisors (74676489).

145726551 is a wasteful number, since it uses less digits than its factorization.

145726551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455 (or 2452 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 145726551 is about 12071.7252702337. The cubic root of 145726551 is about 526.2347968895.

The spelling of 145726551 in words is "one hundred forty-five million, seven hundred twenty-six thousand, five hundred fifty-one".