400272730649 has 4 divisors (see below), whose sum is σ = 436661160720. Its totient is φ = 363884300580.

The previous prime is 400272730621. The next prime is 400272730657. The reversal of 400272730649 is 946037272004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400272730649 is a prime.

It is a super-2 number, since 2×400272730649² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400272730609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18194215019 + ... + 18194215040.

It is an arithmetic number, because the mean of its divisors is an integer number (109165290180).

Almost surely, 2^400272730649 is an apocalyptic number.

It is an amenable number.

400272730649 is a deficient number, since it is larger than the sum of its proper divisors (36388430071).

400272730649 is a wasteful number, since it uses less digits than its factorization.

400272730649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36388430070.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 400272730649 in words is "four hundred billion, two hundred seventy-two million, seven hundred thirty thousand, six hundred forty-nine".