151561001954 has 4 divisors (see below), whose sum is σ = 227341502934. Its totient is φ = 75780500976.

The previous prime is 151561001953. The next prime is 151561001959. The reversal of 151561001954 is 459100165151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 459100165151 = 53 ⋅8662267267.

It can be written as a sum of positive squares in only one way, i.e., 106416226225 + 45144775729 = 326215^2 + 212473^2 .

It is a super-3 number, since 3×151561001954³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (151561001953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37890250487 + ... + 37890250490.

Almost surely, 2^151561001954 is an apocalyptic number.

151561001954 is a deficient number, since it is larger than the sum of its proper divisors (75780500980).

151561001954 is an equidigital number, since it uses as much as digits as its factorization.

151561001954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75780500979.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 151561001954 in words is "one hundred fifty-one billion, five hundred sixty-one million, one thousand, nine hundred fifty-four".