1901769345 has 48 divisors (see below), whose sum is σ = 3988932480. Its totient is φ = 818237952.

The previous prime is 1901769343. The next prime is 1901769371. The reversal of 1901769345 is 5439671091.

It is not a de Polignac number, because 1901769345 - 2¹ = 1901769343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1901769345.

It is not an unprimeable number, because it can be changed into a prime (1901769343) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 172215 + ... + 182924.

It is an arithmetic number, because the mean of its divisors is an integer number (83102760).

Almost surely, 2^1901769345 is an apocalyptic number.

1901769345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1901769345 is an abundant number, since it is smaller than the sum of its proper divisors (2087163135).

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

1901769345 is a wasteful number, since it uses less digits than its factorization.

1901769345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355174 (or 355171 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 1901769345 is about 43609.2804916568. The cubic root of 1901769345 is about 1238.9466742210.

The spelling of 1901769345 in words is "one billion, nine hundred one million, seven hundred sixty-nine thousand, three hundred forty-five".