151703121491 has 4 divisors (see below), whose sum is σ = 154565444592. Its totient is φ = 148840798392.

The previous prime is 151703121487. The next prime is 151703121497. The reversal of 151703121491 is 194121307151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194121307151 = 43051 ⋅4509101.

It is a cyclic number.

It is not a de Polignac number, because 151703121491 - 2² = 151703121487 is a prime.

It is a super-2 number, since 2×151703121491² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151703121497) 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, 1431161471 + ... + 1431161576.

It is an arithmetic number, because the mean of its divisors is an integer number (38641361148).

Almost surely, 2^151703121491 is an apocalyptic number.

151703121491 is a deficient number, since it is larger than the sum of its proper divisors (2862323101).

151703121491 is an equidigital number, since it uses as much as digits as its factorization.

151703121491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862323100.

The product of its (nonzero) digits is 7560, while the sum is 35.

The spelling of 151703121491 in words is "one hundred fifty-one billion, seven hundred three million, one hundred twenty-one thousand, four hundred ninety-one".