1901720696450 has 48 divisors (see below), whose sum is σ = 3545267240160. Its totient is φ = 758955496320.

The previous prime is 1901720696429. The next prime is 1901720696471. The reversal of 1901720696450 is 546960271091.

It is an interprime number because it is at equal distance from previous prime (1901720696429) and next prime (1901720696471).

It is a super-3 number, since 3×1901720696450³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39382421 + ... + 39430679.

It is an arithmetic number, because the mean of its divisors is an integer number (73859734170).

Almost surely, 2^{1901720696450} is an apocalyptic number.

1901720696450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1901720696450 is a deficient number, since it is larger than the sum of its proper divisors (1643546543710).

1901720696450 is a wasteful number, since it uses less digits than its factorization.

1901720696450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50051 (or 50046 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 1901720696450 in words is "one trillion, nine hundred one billion, seven hundred twenty million, six hundred ninety-six thousand, four hundred fifty".