2151003150661 has 8 divisors (see below), whose sum is σ = 2173221197784. Its totient is φ = 2128785976320.

The previous prime is 2151003150601. The next prime is 2151003150677. The reversal of 2151003150661 is 1660513001512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1036743458436 + 1114259692225 = 1018206^2 + 1055585^2 .

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 2151003150661 - 2¹⁹ = 2151002626373 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 (2151003150601) 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, 5508321 + ... + 5885881.

It is an arithmetic number, because the mean of its divisors is an integer number (271652649723).

Almost surely, 2^{2151003150661} is an apocalyptic number.

It is an amenable number.

2151003150661 is a deficient number, since it is larger than the sum of its proper divisors (22218047123).

2151003150661 is an equidigital number, since it uses as much as digits as its factorization.

2151003150661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436391.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 2151003150661 in words is "two trillion, one hundred fifty-one billion, three million, one hundred fifty thousand, six hundred sixty-one".