961381000651 has 4 divisors (see below), whose sum is σ = 961388135352. Its totient is φ = 961373865952.

The previous prime is 961381000579. The next prime is 961381000661. The reversal of 961381000651 is 156000183169.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 961381000651 - 2¹¹ = 961380998603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961381000661) 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, 3361261 + ... + 3636046.

It is an arithmetic number, because the mean of its divisors is an integer number (240347033838).

Almost surely, 2^961381000651 is an apocalyptic number.

961381000651 is the 524100-th centered heptagonal number.

961381000651 is a deficient number, since it is larger than the sum of its proper divisors (7134701).

961381000651 is a wasteful number, since it uses less digits than its factorization.

961381000651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7134700.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 961381000651 in words is "nine hundred sixty-one billion, three hundred eighty-one million, six hundred fifty-one", and thus it is an aban number.