291861862954 has 4 divisors (see below), whose sum is σ = 437792794434. Its totient is φ = 145930931476.

The previous prime is 291861862891. The next prime is 291861862961. The reversal of 291861862954 is 459268168192.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 287267056729 + 4594806225 = 535973^2 + 67785^2 .

It is a super-2 number, since 2×291861862954² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 291861862892 and 291861862901.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72965465737 + ... + 72965465740.

Almost surely, 2^291861862954 is an apocalyptic number.

291861862954 is a deficient number, since it is larger than the sum of its proper divisors (145930931480).

291861862954 is a wasteful number, since it uses less digits than its factorization.

291861862954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145930931479.

The product of its digits is 14929920, while the sum is 61.

The spelling of 291861862954 in words is "two hundred ninety-one billion, eight hundred sixty-one million, eight hundred sixty-two thousand, nine hundred fifty-four".