1901145546 has 32 divisors (see below), whose sum is σ = 4408456320. Its totient is φ = 606161952.

The previous prime is 1901145539. The next prime is 1901145553. The reversal of 1901145546 is 6455411091.

1901145546 is a `hidden beast` number, since 1 + 90 + 1 + 14 + 554 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1901145539) and next prime (1901145553).

It is a super-2 number, since 2×1901145546² = 7228708774151276232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1901145546.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764115 + ... + 766598.

It is an arithmetic number, because the mean of its divisors is an integer number (137764260).

Almost surely, 2^1901145546 is an apocalyptic number.

1901145546 is an abundant number, since it is smaller than the sum of its proper divisors (2507310774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1901145546 is a wasteful number, since it uses less digits than its factorization.

1901145546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530747 (or 1530741 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 1901145546 is about 43602.1277691812. The cubic root of 1901145546 is about 1238.8111971866.

The spelling of 1901145546 in words is "one billion, nine hundred one million, one hundred forty-five thousand, five hundred forty-six".