3634148981 has 4 divisors (see below), whose sum is σ = 3825420000. Its totient is φ = 3442877964.

The previous prime is 3634148839. The next prime is 3634148983. The reversal of 3634148981 is 1898414363.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3634148981 is a prime.

It is a super-2 number, since 2×3634148981² = 26414077632206676722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3634148983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95635481 + ... + 95635518.

It is an arithmetic number, because the mean of its divisors is an integer number (956355000).

Almost surely, 2^3634148981 is an apocalyptic number.

It is an amenable number.

3634148981 is a deficient number, since it is larger than the sum of its proper divisors (191271019).

3634148981 is a wasteful number, since it uses less digits than its factorization.

3634148981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191271018.

The product of its digits is 497664, while the sum is 47.

The square root of 3634148981 is about 60283.9031666000. The cubic root of 3634148981 is about 1537.4496750972.

The spelling of 3634148981 in words is "three billion, six hundred thirty-four million, one hundred forty-eight thousand, nine hundred eighty-one".