401498749921 has 8 divisors (see below), whose sum is σ = 402887338560. Its totient is φ = 400111663152.

The previous prime is 401498749919. The next prime is 401498749931. The reversal of 401498749921 is 129947894104.

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

It is a cyclic number.

It is not a de Polignac number, because 401498749921 - 2¹ = 401498749919 is a prime.

It is a super-2 number, since 2×401498749921² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401498749931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161446 + ... + 910528.

It is an arithmetic number, because the mean of its divisors is an integer number (50360917320).

Almost surely, 2^401498749921 is an apocalyptic number.

It is an amenable number.

401498749921 is a deficient number, since it is larger than the sum of its proper divisors (1388588639).

401498749921 is a wasteful number, since it uses less digits than its factorization.

401498749921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750935.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 401498749921 in words is "four hundred one billion, four hundred ninety-eight million, seven hundred forty-nine thousand, nine hundred twenty-one".