40698917640 has 128 divisors (see below), whose sum is σ = 135715276800. Its totient is φ = 10848867840.

The previous prime is 40698917627. The next prime is 40698917731. The reversal of 40698917640 is 4671989604.

40698917640 is a `hidden beast` number, since 406 + 98 + 91 + 7 + 64 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3656724 + ... + 3667836.

It is an arithmetic number, because the mean of its divisors is an integer number (1060275600).

Almost surely, 2^40698917640 is an apocalyptic number.

40698917640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40698917640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67857638400).

40698917640 is an abundant number, since it is smaller than the sum of its proper divisors (95016359160).

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

40698917640 is a wasteful number, since it uses less digits than its factorization.

40698917640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14524 (or 14514 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 40698917640 in words is "forty billion, six hundred ninety-eight million, nine hundred seventeen thousand, six hundred forty".