172054826241661 has 12 divisors (see below), whose sum is σ = 189417826629472. Its totient is φ = 156165596433000.

The previous prime is 172054826241601. The next prime is 172054826241667. The reversal of 172054826241661 is 166142628450271.

It is a happy number.

It is not a de Polignac number, because 172054826241661 - 2²¹ = 172054824144509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172054826241667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1126659555 + ... + 1126812256.

Almost surely, 2^{172054826241661} is an apocalyptic number.

172054826241661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172054826241661 is a deficient number, since it is larger than the sum of its proper divisors (17363000387811).

172054826241661 is a wasteful number, since it uses less digits than its factorization.

172054826241661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253472464 (or 2253472453 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 172054826241661 in words is "one hundred seventy-two trillion, fifty-four billion, eight hundred twenty-six million, two hundred forty-one thousand, six hundred sixty-one".