401025156261 has 8 divisors (see below), whose sum is σ = 534823173600. Its totient is φ = 267288621552.

The previous prime is 401025156239. The next prime is 401025156263. The reversal of 401025156261 is 162651520104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 401025156261 - 2⁶ = 401025156197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401025156263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15355435 + ... + 15381528.

It is an arithmetic number, because the mean of its divisors is an integer number (66852896700).

Almost surely, 2^401025156261 is an apocalyptic number.

It is an amenable number.

401025156261 is a deficient number, since it is larger than the sum of its proper divisors (133798017339).

401025156261 is a wasteful number, since it uses less digits than its factorization.

401025156261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30741315.

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 401025156261 its reverse (162651520104), we get a palindrome (563676676365).

The spelling of 401025156261 in words is "four hundred one billion, twenty-five million, one hundred fifty-six thousand, two hundred sixty-one".