901401772490 has 32 divisors (see below), whose sum is σ = 1634418296784. Its totient is φ = 357924510720.

The previous prime is 901401772487. The next prime is 901401772493. The reversal of 901401772490 is 94277104109.

It is an interprime number because it is at equal distance from previous prime (901401772487) and next prime (901401772493).

It can be written as a sum of positive squares in 8 ways, for example, as 51765805441 + 849635967049 = 227521^2 + 921757^2 .

It is a super-2 number, since 2×901401772490² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (901401772493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561122 + ... + 1455218.

Almost surely, 2^901401772490 is an apocalyptic number.

901401772490 is a deficient number, since it is larger than the sum of its proper divisors (733016524294).

901401772490 is a wasteful number, since it uses less digits than its factorization.

901401772490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894842.

The product of its (nonzero) digits is 127008, while the sum is 44.

Adding to 901401772490 its reverse (94277104109), we get a palindrome (995678876599).

The spelling of 901401772490 in words is "nine hundred one billion, four hundred one million, seven hundred seventy-two thousand, four hundred ninety".