154351601203661 has 4 divisors (see below), whose sum is σ = 155850160438752. Its totient is φ = 152853041968572.

The previous prime is 154351601203571. The next prime is 154351601203663. The reversal of 154351601203661 is 166302106153451.

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-154351601203661 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 (154351601203663) 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, 749279617391 + ... + 749279617596.

It is an arithmetic number, because the mean of its divisors is an integer number (38962540109688).

Almost surely, 2^{154351601203661} is an apocalyptic number.

It is an amenable number.

154351601203661 is a deficient number, since it is larger than the sum of its proper divisors (1498559235091).

154351601203661 is a wasteful number, since it uses less digits than its factorization.

154351601203661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498559235090.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 154351601203661 in words is "one hundred fifty-four trillion, three hundred fifty-one billion, six hundred one million, two hundred three thousand, six hundred sixty-one".