1901591430142 has 4 divisors (see below), whose sum is σ = 2852387145216. Its totient is φ = 950795715070.

The previous prime is 1901591430131. The next prime is 1901591430143. The reversal of 1901591430142 is 2410341951091.

It is a happy number.

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

It is a super-2 number, since 2×1901591430142² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1901591430095 and 1901591430104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901591430143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475397857534 + ... + 475397857537.

It is an arithmetic number, because the mean of its divisors is an integer number (713096786304).

Almost surely, 2^{1901591430142} is an apocalyptic number.

1901591430142 is a deficient number, since it is larger than the sum of its proper divisors (950795715074).

1901591430142 is an equidigital number, since it uses as much as digits as its factorization.

1901591430142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950795715073.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 1901591430142 in words is "one trillion, nine hundred one billion, five hundred ninety-one million, four hundred thirty thousand, one hundred forty-two".