151261666403 has 4 divisors (see below), whose sum is σ = 159222806760. Its totient is φ = 143300526048.

The previous prime is 151261666373. The next prime is 151261666447. The reversal of 151261666403 is 304666162151.

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 151261666403 - 2²⁶ = 151194557539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151261666483) 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, 3980570150 + ... + 3980570187.

It is an arithmetic number, because the mean of its divisors is an integer number (39805701690).

Almost surely, 2^151261666403 is an apocalyptic number.

151261666403 is a deficient number, since it is larger than the sum of its proper divisors (7961140357).

151261666403 is an equidigital number, since it uses as much as digits as its factorization.

151261666403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7961140356.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 151261666403 in words is "one hundred fifty-one billion, two hundred sixty-one million, six hundred sixty-six thousand, four hundred three".