151651661101591 has 16 divisors (see below), whose sum is σ = 174192122280960. Its totient is φ = 129331471356000.

The previous prime is 151651661101553. The next prime is 151651661101607. The reversal of 151651661101591 is 195101166156151.

It is a cyclic number.

It is not a de Polignac number, because 151651661101591 - 2¹⁹ = 151651660577303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151651661101531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52205881 + ... + 55034146.

It is an arithmetic number, because the mean of its divisors is an integer number (10887007642560).

Almost surely, 2^{151651661101591} is an apocalyptic number.

151651661101591 is a deficient number, since it is larger than the sum of its proper divisors (22540461179369).

151651661101591 is a wasteful number, since it uses less digits than its factorization.

151651661101591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107241054.

The product of its (nonzero) digits is 243000, while the sum is 49.

The spelling of 151651661101591 in words is "one hundred fifty-one trillion, six hundred fifty-one billion, six hundred sixty-one million, one hundred one thousand, five hundred ninety-one".